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2012 is here, and the world shows no sign of ending as the heavens spin on their appointed rounds high overhead. But the diligent observer may be rewarded with several unique an spurious sights, both natural and manmade…

1^st up is everyone’s favorite meteor shower named after an obsolete constellation; the Quadrantids peak the morning of January 4^th in what is the first large meteor shower of the year. The peak is very swift, only lasting about 12 hours or so and is centered this year on 2:00 AM EST/7:00 AM UTC. This favors the U.S. East Coast in 2012, as the 79% waxing gibbous Moon will set around 2AM local the morning of the 4^th for observers in mid-northern latitudes. The radiant of the shower lies at a declination of 52° degrees north at the junction of the modern constellations of Draco, Bootes and Hercules, and thus activity may be visible pre-midnite local, although the setting of the Moon and the rising of the radiant will raise sighting prospects considerably. Expect swift-moving meteors headed outward from the radiant above the handle of the Big Dipper to appear anywhere in the sky. The Quadrantids have been known since the early 1800’s, but there has been much conjecture as to the source parent body. Astronomer Fred Whipple noted in 1963 that the stream bears some resemblance to the Delta Aquarids, and that the orbital path has undergone alterations by the planet Jupiter in the last few thousand years. In 2003, SETI researcher Peter Jenniskens proposed that the source may be then recently discovered asteroid 2003 EH1, which has been tentatively linked to Comet C/1490 Y1, which approached Earth at a distance of 0.52 Astronomical Units on January 12^th 1491. Be sure to keep an eye out for Quadrantids on these chilly January mornings, as we commemorate Quadrans Muralis, a constellation that is no longer! Read the rest of this entry »

 

As 2011 is drawing to a close, the festive season is here and many of us are winding down and looking forward to the holidays. But this is a great time to look ahead to 2012 and pencil into our calendar and diaries the top astronomical events we don’t want to miss next year.

2012 is going to be a great year for astronomy observing, with some rare and exciting things taking place and a good outlook with some of the regular annual events.

So what top wonders should we expect to see and what will 2012 bring? Read the rest of this entry »

Originally posted by and full credit to NASA view the original article here

NASA’s Kepler mission has confirmed its first planet in the “habitable zone,” the region where liquid water could exist on a planet’s surface. Kepler also has discovered more than 1,000 new planet candidates, nearly doubling its previously known count. Ten of these candidates are near-Earth-size and orbit in the habitable zone of their host star. Candidates require follow-up observations to verify they are actual planets.

The newly confirmed planet, Kepler-22b, is the smallest yet found to orbit in the middle of the habitable zone of a star similar to our sun. The planet is about 2.4 times the radius of Earth. Scientists don’t yet know if Kepler-22b has a predominantly rocky, gaseous or liquid composition, but its discovery is a step closer to finding Earth-like planets. Read the rest of this entry »

Professor Brian Cox and Dara O Briain host three days of live stargazing on BBC 2 featuring epic images from astronomers and observatories from around the globe.

There will be hundreds of free events up and down the country and many useful videos and guides on the Stargazing web page.

Stargazing Live is all about people doing astronomy and witnessing some of the most spectacular astronomical events, including the conjunction of the planets Jupiter and Uranus, the Quadrantid meteor shower and other wonders of the night sky.

In the spirit of getting everyone to look up and share all of the fantastic things going on as well as the BBC 2 program, meteorwatch.org will be doing a twitter meteorwatch for the quadrantids meteor shower, headed up by Adrian West (@VirtualAstro on Twitter).

As well as all the useful information for beginners on this site and tweets from many people joining in on twitter, meteorwatch.org will have the Meteormap.

Tweet #bbcstargazing or #meteorwatch – first part of your postcode – Country e.g UK – and how many meteors you just saw, e.g 3 to see your meteor results appear on the map.

Your tweet should look like this #bbcstargazing SE1 UK 2  or  #meteorwatch PL4 UK 1

Enjoy BBC Stargazing Live, the many events and Twitter Meteorwatch, but most of all, tell your family, tell your friends and tell everyone to look up and enjoy the majesty and wonders of the night sky!

The BBC is not moderating/ overseeing or is responsible for the content on this post, meteorwatch.org or the Twitter Meteorwatch.

Originally posted on Dark Sky Diary by Steve Owens www.twitter.com/darkskyman

The first meteor shower of 2011 is the Quadrantids, the peak of which falls on the night of the 03/04 January 2011. The Quadrantids shower has one of the highest predicted hourly rates of all meteor showers, comparable to the two great annual showers, the Perseids and the Geminids, occurring in August and Deember respectively. However unlike the Perseids and Geminids, the Quadrantids peak is very narrow, occurring over just a few short hours.  (You can read the IMO’s rather technical summary of the 2011 Quadrantids here: http://www.imo.net/calendar/2011#qua)

The predicted Zenith Hourly Rate (see my previous post about ZHR and what it actually means here) for the Quadrantids is around 120. The narrow peak is predicted to occur some time between 2100 on 3 January and 0600  on 4 January 2011, however the radiant of the shower – the now-defunct constellation Quadrans Muralis – is very low in the evening hours, rising higher towards dawn, and so the best viewing times are later in this run, just before dawn.

The radiant will rise due N and get to its highest before dawn due E, so look roughly in a NE direction to maximise your chance of seeing some Quadrantids. As always with meteor showers, don’t use binoculars or a telescope – your naked eyes are best. One very useful bit of equipment is a reclining deck chair, which makes observing so much more comfortable!

Let’s use the equation relating ZHR to actual observations of meteors to work out how many Quadrantids you might see:

Actual Hourly Rate = (ZHR x sin(h))/((1/(1-k)) x 2^(6.5-m)) where

h = the height of the radiant above the horizon

k = fraction of the sky covered in cloud

m = limiting magnitude

In the case of the 2011 Quadrantids, if observed from the UK, h = 15 degrees at 2100, rising to 25 degrees at midnight, 40 degrees at 0300, and 65 degrees at 0600. Let’s assume you have clear skies (haha) with k = 0.

The number of Quadrantids you can expect to see from a variety of observing sites, at various times throughout the night, is as follows:

For very light polluted sites, such as city centres, m = 3, and therefore you can expect to see between 3 and 10 meteors per hour at the peak, depending on when it occurs.

In suburban skies near a city or town centre m = 4, and you’ll see between 5 and 20 meteors per hour at the peak, depending on when it occurs.

In rural skies where m = 5, you’ll see between 11 and 38 meteors per hour at the peak, depending on when it occurs.

Under very dark skies, where m = 6.5 (i.e. where there is no or negligible effect of light pollution, like in Galloway Forest Dark Sky Park) you’ll see anywhere between 31 and 109 meteors per hour at the peak, depending on when it occurs.

Remember, all of these numbers assume perfectly clear skies. If half your sky is cloudy, cut these numbers in half!

Also remember that it depends when the peak occurs. Due to the rather narrow peak, if you observe at 2100 on 3 January you may see very few if the peak doesn’t occur until 0600. Still, it’s very much worth a look, just in case!

How many Quadrantid meteors will I see?

Where are you observing from?	Limiting magnitude	Number of Quadrantids per hour if peak occurs at 2100	Number of Quadrantids per hour if peak occurs at 0000	Number of Quadrantids per hour if peak occurs at 0300	Number of Quadrantids per hour if peak occurs at 0600
Very light polluted city centre	3	3	5	7	10
Suburban Site	4	5	9	14	20
Rural Site	5	11	18	27	38
Dark Sky Site	6.5	31	50	77	109

By Twitter..@Betelgeuse10

Original post http://astronomycentral.co.uk/the-night-sky-with-binoculars-tonight

 

Thursday 25th November, 2010

Get yourself outside tonight if it’s clear, pull up a deck chair, and scan the star clusters, nebulae, and even see another galaxy with your binoculars. They are just perfect for some objects like the larger open clusters. Just aimlessly wandering along the band of the Milky Way is also very enjoyable. If you have binoculars up to 10 x 50 then they’re ideal for the job, portable, and easy to hold. Anything over this size will usually need a tripod. All the objects listed here are at their best in dark skies, ideally with the bright Moon not around.

The Moon tonight…waning gibbous 73% full, rising in NE at 7.53 pm, and setting in NW at 11.36 am (GMT) (26th)

 

The Sword of Orion, and M42

Rising in the east tonight is the impressive constellation of Orion The Hunter, a sure sign of winter. It’s a striking constellation with the unmistakable, straight line of the three stars of Orion’s belt. Now look below the belt and you’ll see Orion’s Sword. To your naked eye it looks like a line of three fuzzy stars that hang down from the belt, resembling a sword. But when you look through your binos you will see that this is actually a group of star clusters, not individual stars. Notice how the middle cluster glows, especially with averted vision. What you are looking at is the famous, and probably most photographed deep sky object ever, the Orion Nebula or M42. This object is a huge and complex region of gas clouds, around 14 light years across. This place at 1,500 light years away is a vast stellar nursery, but it’s just one small part of an even larger region of gas that spans nearly the entire constellation. New stars, solar systems in formation, and even freely floating planets have all been observed in the Orion Nebula.

Tonight the Orion Nebula rises in the east at 8.01 pm, climbs highest in the south at 1.33 am (GMT), and sets in the west after sunrise.

The Orion Nebula can even be seen with the naked eye under very good skies, it is a magnitude 4.0 object

 How long will it be around for? The Orion Nebula is in a winter constellation. So it will slowly and gradually move across the sky eventually sinking into the west by the end of March, when it will make way for the spring constellations rising in the east. 

 

The Pleiades, or Seven Sisters

Rising in the north east tonight in the constellation Taurus is the one open cluster that lots of people can name and recognise, the Seven Sisters, The Pleiades, or M45. It lies between Perseus and Orion, and to the east of Auriga. You can easily see it naked eye, as a large fuzzy patch of stars. M45 is a close open cluster at just 440 light years away, it’s one of the nearest and so appears large in the sky. The stars in the cluster are also very young at only around 150 million years, and the brightest ones you can see are also the very youngest and hottest. The “Seven Sisters” cluster actually contains up to 1,400 members.

This attractive open star cluster fits nicely into your binoculars field of view, providing a very satisfying sight especially in dark skies with the Moon absent.

Tonight the Pleiades Cluster rises in the north east at 3.14 pm, it gets to its highest point in the south at 11.24 pm (GMT), and sets in the north west after sunrise.

The Pleiades Cluster is at magnitude 1.6

 How long will it be around for? The Pleiades too will be visible in the sky with the Orion Nebula until around the end of March.  

 

The Andromeda Galaxy, M31

High in the eastern sky tonight is the famous Andromeda Galaxy, or M31. It is a huge spiral galaxy 2.5 million light years away, with up to one trillion stars, and a diameter of up to 220,000 light years…more than twice the size of our Milky Way. You can even see Andromeda naked eye as a fuzzy glow, and there are two main ways to find this island universe in the sky. One is to locate the large square of Pegasus  with its four stars marking each corner. You’ll find Pegasus to the east of Perseus, and Cassiopeia. The star at the upper left of the square is called Sirrah (or Alpheratz), look to the left of Sirrah and you’ll see three stars in a line, a dimmer star and two  bright stars. The first bright star is Mirach. Now look above Mirach and you’ll see a dimmer star, look about the same distance above again from the dimmer star, and here is located the Andromeda Galaxy (M31). Another way to find M31 it is to use the right hand V of the W of Cassiopeia and imagine a line pointing down, this V points just to the left of Andromeda.

Get your binoculars on M31 and you’ll see the bright core of the galaxy as a small fuzzy blob. But keep studying and use averted vision, and you’ll soon start to make out the fainter shape of the galaxy’s disk extending out from the core. This is an object far outside the Milky Way, an entire ”island universe”. To be seen at its best Andromeda should be observed with the bright Moon absent under dark skies, but it’s still visible even from urban areas. 

Tonight the Andromeda Galaxy is rising from in the east after dusk, it’s virtually directly overhead at 8.44 pm (GMT), and eventually sinks low in the north west before sunrise. It is circumpolar, meaning it never sets in northern latitudes.

M31 is at magnitude 3.4

How long will it be around for? The Andromeda Galaxy is actually circumpolar from northern latitudes. It is nicely high in the sky now but will gradually sink to its lowest point just above the horizon in the north in mid March, before starting its rise again.

 

The Perseus Double Cluster

This cluster is one of my favourites, it looks stunning in a telescope at low power, but binoculars also show it well. The Perseus Double Cluster, NGC 884 and NGC 869, or H and X Persei are actually two seperate open star clusters close to each other in space at around 7,000 light years away. They are only a few million years old, much younger than the Pleaides. To find it I could tell you to find this star, draw a line to that star etc, but the easiest way I have found to locate the Perseus Double is just to look for a fuzzy irregular patch in the band of the Milky Way between Cassiopeia and Perseus, (cluster marked as H+X on Perseus map). Once you see it, get your binos on it and you’ll see two very attractive open clusters of sparkling stars set against the blackness of space. There’s also a nice line of stars that curves away from the upper most cluster, when you see this line of stars you’ll know you have this popular deep sky object in your view.

Tonight you’ll see the Perseus Double Cluster rising from the north east after dark and getting very high in the sky to the east. It is circumpolar meaning it’s always above the horizon and never sets.

This open cluster is a magnitude 4.00 object

 How long will it be around for? The Perseus Double Cluster will always be above the horizon, but by April it will have moved over to the north and much lower in the sky.

 

Jupiter and its moons

Jupiter the giant of the solar system is on show right now, although it is gradually on the wane as far as size and brightness go, having passed full opposition in mid September. But the solar system’s most massive planet and its collection of four main moons can be seen in binoculars. Look to the east after it goes dark and the brightest “star” you see is Jupiter. Put your binoculars on it and although the disk of the planet is small, look carefully and you should see four tiny pinpoints of light around it. These are the moons of Jupiter, Ganymede, Callisto, Io, and Europa. Jupiter’s moon Io is the most volcanic place in the entire solar system, and Europa is covered in ice with an ocean below its frozen crust. One of those four pinpoints of light you see (Europa) has more water on it than all of Earth’s oceans put together, and could even have extraterrestrial life living there. Ganymede is the largest moon in the solar system, even bigger than Mercury, and Callisto could also have a subsurface ocean. The moons shift and change postion over mere hours, so it’s a continually changing scene.

Tonight you’ll see Jupiter quite high in the south east by night fall, it rises highest in the south at 7.33 pm, and sets in the west at 1.08 am. (GMT)

Tonight Jupiter is at magnitude -2.44

How long will it be around for? Jupiter will eventually go out of sight in the setting Sun’s glow by March 2011.

 

The Beehive Cluster, M44

The Beehive Cluster, Praesepe, M44, or NGC 2632 is a very nice and attractive open star cluster to look at through your binoculars, and does kind of look like a swarm of bees. The Beehive is another open cluster close to Earth, at 577 light years away in the constellation of Cancer. This puts it slightly further away than the Pleaides. M44 rises from the north east, and you’ll see it with your naked eye as a nebulous patch on clear moonless nights. This cluster lies in the fainter constellation of Cancer, in between Leo, and Gemini. The stars that make up the head of Leo the Lion look like a large backwards question mark. You’ll find M44 with your naked eye roughly half way between this “question mark”, and the two twin stars of Castor and pollux in Gemini. The Beehive actually has over 1,000 stars, and is around 600 million years old.

This is really one for the early hours at the moment, as you’ll have to wait until beyond midnight if you want to get a good view of the Beehive Cluster. Tonight it rises from the north east at 8.41 pm (GMT), and climbs to its highest point in the south just before sunrise. Viewing this object gets more convenient in the coming weeks though, as it gradually rises earlier.

This object is at magnitude 3.7

How long will it be around for By April when M42 and the Pleiades will be sinking into the western horizon, the Beehive Cluster will still be nice and high in the sky in the south. But by June it will have disappeared below the north west horizon by nightfall.  

 

The Hyades Cluster

Look to the eastern sky, to the lower left of the Pleaides Cluster, and you’ll see the bright orange star Alderbaran. Alderbaran is an orange giant, and marks the eye of the bull in the constellation Taurus. Alderbaran marks the position of the closest star cluster to Earth, the Hyades. This star grouping of up to 400 members is large and loose, due to its closeness at a mere 151 light years away. This open cluster is so spread out that even your binoculars will just about get all of its stars in their field of view. But this is a really nice collection of suns to gaze at through your binos on crisp dark nights. It contrasts well with bright Alderbaran, although this orange giant is not actually a member of the Hyades Cluster, being much closer to Earth at 65 light years away.

Tonight the Hyades Cluster rises from the east at 4.44 pm, and gets nice and high in the south at 12.38 am (GMT), eventually sinking towards the western horizon before daybreak.

How long will it be around for? The Hyades Cluster will be on view until March/April. At this time it will be close behind the setting Sun, following it into the western horizon.   

…also check out Planets To See In The Sky Tonight

The final meteor shower of 2010 is the Geminids, the peak of which falls on the night of the 13/14 December 2010. The Geminids is described by the IMO as “one of the finest, and probably the most reliable, of the major annual showers presently observable”, and this year’s shower is set to put on a good show. (You can read the IMO’s rather technical summary of the 2010 Geminids here: http://www.imo.net/calendar/2010#gem)

The predicted Zenith Hourly Rate (see my previous post about ZHR and what it actually means here) is around 120. Although the peak is predicted to occur around 1100 on 14 December, it should happen some time between 1840 on 13 December and 1600 on 14 December 2010. The best time for the peak to occur for stargazers in the UK would be between 0030 and 0600 on 14 December, after the Moon sets but before twilight begins.

The radiant for this shower is actually quite favourable, and if you wait till the Moon sets at around 0030 on 14 December then the only light pollution limiting your view will be man-made. If you observe before the Moon sets then you will lose a few of the fainter Geminids in its glow, but it’s only a first quarter moon, and so will only really have an impact if you’re observing from very dark skies.

Let’s use the equation relating ZHR to actual observations of meteors to work out how many you might see:

Actual Hourly Rate = (ZHR x sin(h))/((1/(1-k)) x 2^(6.5-m)) where

h = the height of the radiant above the horizon

k = fraction of the sky covered in cloud

m = limiting magnitude

In the case of the 2010 Geminids, if observed from the UK, h = 45 degrees. Let’s assume you have clear skies (haha) with k = 0.

The number of Geminids you can expect to see from a variety of observing sites is as follows:

For very light polluted sites, such as city centres m = 3, and therefore you can expect to see only around 8 meteors per hour.

In suburban skies near a city or town centre m = 4, and you’ll see around 15 meteors per hour.

In rural skies where m = 5, you’ll see 30 meteors per hour.

Under very dark skies, where m = 6.5 (i.e. where there is no or negligible effect of light pollution, like in Galloway Forest Dark Sky Park) you’ll see up to 85 meteors per hour, once the Moon sets. A first quarter moon will impose a limiting magnitude, even at a very dark site, of around 6, in which case you’ll see a slightly reduced 60 meteors per hour.

Remember, all of these numbers assume perfectly clear skies. If half your sky is cloudy, cut these numbers in half!

How many Geminid meteors will I see?

Where are you observing from?	Limiting magnitude	Number of Geminids per hour
A very light polluted city centre	3	7 or 8
Suburban Site	4	15
Rural Site	5	30
Dark Sky Site	6.5	85 (after the Moon sets at 0030)

If you fancy a good view of this spectacular meteor shower, then head to Galloway Forest Dark Sky Park, where we have an evening of talks and meteorwatching planned, weather permitting!

Originally posted by Steve Owens (@darkskyman) on his blog Dark Sky Diary Pursuing darkness in an increasingly bright world

Earth is entering a broad stream of debris from Halley's Comet, and this is causing the annual Orionid meteor shower. "The best time to look is during the hours before dawn on Thursday, Oct. 21st, and again on Friday, Oct 22nd," advises Bill Cooke of NASA's Meteoroid Environment Office. "Unfortunately, we have a bright Moon this year. Even so, I'd expect some bright Orionids to shine through the moonlight." An all-sky camera at the University of Western Ontario recorded this early Orionid fireball on Oct. 18th:

Orionid meteors stream from the elbow of Orion the Hunter: sky map. Because the shower's radiant point is close to the celestial equator, sky watchers in both hemispheres can enjoy the show. Moonlit meteor rates will probably be around a dozen per hour.

Radar rates could be much higher. The US Air Force Space Surveillance Radar in Texas is scanning the skies for satellites, space junk, and meteoroids. When an Orionid passes overhead–ping!–there is an echo. Moonlight does not interfere with this method of meteor observing, so it's perfect for this year's Orionids. Tune into Spaceweather Radio for live echoes.

Orionid images: from John Chumack of Dayton, Ohio; from Calvin Hall of Knik Valley, near Palmer Alaska; from Martin Popek of Nýdek, Czech republic

Originally posted on www.spaceweather.com

Wednesday 11th to Saturday 14th of August 2010

From Wednesday 11th to Saturday 14th of August 2010 the Virtual Astronomer @VirtualAstro with the British Astronomical Association @britastro Beyond International Year of Astronomy and amateur astronomers, will be holding a Twitter Meteorwatch for the Perseid Meteor Shower.

Everyone is welcome to join in, whether they are an astronomer, have a slight interest in the night sky or just wonder?

As well as looking up, enjoying the night sky with us and seeing meteors, maybe for the first time? You will have the opportunity to contribute to Science if you wish, by tweeting and seeing your results on a map, or by submitting Observing Forms if you are a more serious observer.

This event follows on from the popular Twitter Meteorwatch held in August and December 2009 "Meteorwatch 2009"

Use the hash tag: #Meteorwatch and get involved, ask questions, do some science, follow the event and enjoy the wonders of the night sky with us. Images and other information will be tweeted as it happens. Live!

The highlight of the summer meteor showers: The Perseids, reach maximum around The 12th of August and may put on a display of aproximately 80 to 100 meteors per hour under ideal viewing conditions. Conditions this year are good due to there being no moon visible. Let’s hope the skies stay clear.

Perseid meteors are often bright with persistent trails which can linger for a while after the meteor has burned up. Further information on the Perseid meteor shower and how to view it, can be found in this site.

While you are looking for meteors, there will be other objects to look out for such as the Planet Jupiter, the Milky Way, Summer Triangle and manmade Satellites and more.

The Twitter Meteorwatch will start at 21.30 BST on the 11th of August and will continue through to the evening of the 14th of August. Amateur and professional astronomers from the US and other countries are invited to join in and take over from the UK, when the sun comes up here, helping make the event run continuously and be truly international. The event will close in the UK, in the early hours of the 15th of August 2010.