Posts Tagged ‘Canon’

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ISS pass near Venus – 17th April 2012

April 17, 2012

by yaska77

There’s a great account you can follow on Twitter if you’d like to be sent alerts whenever the ISS will be passing your location. Twisst ISS alerts send out thousands of messages every day, and right on shedule this evening the ISS began a pass over my house.

The ISS streaks across the sky near to the bright planet Venus from 17th April (click to enlarge) - Credit: Sky-Watching/A.Welbourn

Taken using a 50mm lens on a 6 second exposure (f/2.5 ISO-200), I think enough of the stars appear cleanly without too much drifting. Venus is beautiful at the moment, and it always looks great in an image!

The ISS streak seems to "phase" as it passes behind part of a tree (click to enlarge) - Credit: Sky-Watching/A.Welbourn

So, 10 minutes in the cold and a nice, bright, high ISS pass later I’m back indoors with a hot cuppa.

And my Canon Eos 550D is having its batteries charged. The Lyrids meteor shower peaks soon, I think I’ll get the flask ready for a night in the cold!

If you’re on Twitter you can follow @twisst and while you’re there, why not follow us too!

And if not you’re not on Twitter yet, come and join us!

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Venus in the Pleiades – 4th April 2012

April 4, 2012

by yaska77

As per usual our skies were cloudy last night. I’m beginning to believe the clouds wait to roll in just before particular astral events, usually the ones I most want to see! Last night (as noted in our Astro Guide for April) the planet Venus appeared as if part of the Pleiades star cluster.

Thankfully tonight Venus hasn’t moved on all that far, and a break in the clouds just after sunset gave us the chance to get some photos!

The bright planet Venus shines next to the Pleiades cluster, and the setting Jupiter is accompanied by some of her moons (click to enlarge) - Credit: Sky-Watching/A.Welbourn

Taken with a Canon Eos 550D using a 50mm lens (4 sec exposure, f/3.5, ISO400), virtually none of the stars you can see in the image above were visible to the naked eye!

A cropped full size view of the beautiful Pleiades next to a radiant Venus (click to enlarge) - Credit: Sky-Watching/A.Welbourn

This is a fullsize cropped section of the image. Yesterday Venus would have appeared lower down and closer to the lower left edge of the cluster, so they would both have appeared in the field of view if the Canon were attached to a telescope.  Another missed opportunity.

Still, the great thing about astrophotography is that there’s always something worthy of imaging, and we like the shots we got this evening.

Space is cool :)

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Astrophotographers capturing the heavens

March 7, 2012

by yaska77

Space pics are cool, no argument from us there. Since we started this blog we’ve brought you enough images to fill a photo album (and have slipped in quite a few of our own along the way).

A lot of people think you need in depth knowledge or mega expensive gear to take astro photos, but from our time spent in the “twitterverse” we’ve learnt that not only are there thousands of enthusiasts eager to get stuck in, but a multitude of talented people who do extraordinary things with a range of equipment!

The Moon

The first point of call for most night sky snappers is our beautiful Moon. We first started imaging the Moon using handhelds and camera phones (held up to the eyepiece of the telescope), but there are a variety of ways to get great images!

This waning Moon image shows great colour! (click to enlarge) - Credit: CJ5ive

If you don’t have a telescope, a DSLR can capture superb images all on its own. Twitter user CJ5ive used a Nikon D200 to grab this shot, and it looks great! Having a sturdy tripod helps remove any camera shake caused by the shutter opening, and with good seeing conditions you can get crystal clear shots.

Moon crater details are well defined in this iPhone 4s image (click to enlarge) - Credit: Phil Hammond

Don’t have a DSLR but have a telescope? With a steady hand Phil Hammond took this great example of afocal photography, using an iPhone 4s and a Sky-Watcher Evostar 102 Telescope. It can take a little patience to get it lined up, but you can get some great close up images.

Using a CCD camera you can capture superb detail, as demonstrated in this image of the Clavius crater (click to enlarge) - Credit: Paul Wharton

Want to get even closer? By using a CCD Camera (like a webcam) you can record video of your target and then stack the individual frames to bring out the details. Paul Wharton provided us with this great close-up of the Clavius crater on the Moon, taken using a Sky-Watcher 200P Telescope and a Trust webcam from eBay bought for 99p!

The Planets

Getting a close up look at the planets through a telescope can be awe inspiring, so imaging them can be very rewarding.

Using a webcam attached to a telescope you can get great images like this great view of Jupiter (click to enlarge) - Credit: John Mason

Jupiter is always a good target as through a telescope you can see clear details. John Mason‘s image shows Jupiter as a beautiful marble in space, captured using a Nexstar 6SE SCT Telescope and a SPC800 webcam (compiled using the stacking software Registax).

The superb clarity of this image of Jupiter (complete with two Moons) by Paul Wharton shows the beauty of the planet (click to enlarge) - Credit: Paul Wharton

The brilliant clarity of this image of Jupiter (complete with two Moons) highlights the beauty of the giant planet - Credit: Paul Wharton

Getting even closer to Jupiter this shot from Paul Wharton shows the different bands, the famous spot and two of Jupiter’s moons. You can even make out the shadow of a moon transiting the disc of the planet! This fantastic image was captured using a Sky-Watcher 200P Telescope and a Philips webcam.

Saturn is another must see through a telescope, and Jamey imaged it incredibly clearly (click to enlarge) - Credit: Jamey Erickson

There’s also nothing like the feeling of viewing the rings of Saturn with your own eyes. Very little compares to seeing it live (as it were) but the picture produced by Jamey Erickson comes awfully close! Created by stacking 40 light frames (with no dark frames) using a Celestron CGE-1100 SCT Telescope, a Canon 5D Mk II remote via MacBook Air, all guided with an iPad via SkySafariPro. That’s quite a setup!

Stars and a Nebula

Most of the time clouds are an astrophotographer’s nemesis, but they can help provide great atmosphere to a photo of the stars.

Cloud movement in a long exposure shot can create a beautiful ethereal feel when in front of a clear star filled background (click to enlarge) - Credit: John Mason

Orion is one of the most easily recognisable constellations in the night sky, and John Mason took this great shot of it framed by clouds using a Canon 1000D at 18mm on a 7 second exposure.

A similar shot of the fantastic Orion, with added International Space Station goodness (click to enlarge) - Credit: Sarah (purpleface)

The ISS frequently passes over the UK, an example of such a pass can be seen in Sarah’s image featuring Orion and the Hyades cluster above. Taken using a Canon 7D with the 18-55mm kit lens, 15 second exposure at ISO 400 (f/3.5). It also helps demonstrate just how far the space station travels across the sky in 15 seconds when moving at around 17,500mph.

It’s about 73 miles, the equivalent driving distance from Peckham in London to Dover by the English Channel!

Using a good zoom lens you can clearly capture the dusty shape of the Orion Nebula (click to enlarge) - Credit: Sarah (purpleface)

Using the same camera but this time a 90-300mm lens, Sarah’s shot of the Orion Nebula shows clear definition of its familiar shape, taken at an exposure time of 3.2 seconds, ISO 5000 (f/5.6).

Stacked shots taken via a telescope can provide far more detail than a single exposure alone, as this fantastic image demonstrates (click to enlarge) - Credit: Jamey Erickson

This jawdropping picture of the Orion Nebula from Jamey is the result of stacking 50 light frames and 50 dark frames (with the same equipment as his Saturn image above). Both images were stacked in Nebulosity and processed in PixInsight.

If you’d like to have a look through more of our contributor’s photographs, click on their name below and you’ll be transported to their snaps or Twitter feed. This is just a small example of what our friends on Twitter are doing, so they’re well worth a look through!

Come and join in the fun :)

Contributors

CJ5ive on Flickr
Phil Hammond on Twitter
Paul Wharton on Flickr
John Mason on Twitter
Jamey Erickson on Flickr
Sarah (purpleface) on Flickr

All images are copyright their respective owners

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Astronomy Events – November 2011

October 31, 2011

by yaska77

It’s been a little quiet here of late, but we’re hoping better weather is on the way. It can’t be cloudy all the time right?!

That said, October was actually one of our best ever months for observing, we even got the best images we’ve taken with our own equipment so far! Most of them came about from astro events we listed, so here is a list of upcoming astronomy events for November to whet your appetites.

Tuesday 1st November – The Great Red Spot on Jupiter will be visible through a good telescope on the central median line around 21:15 (UTC/GMT) tonight, but also on a number of nights throughout November (see comments below for more info)

Jupiter is only just past opposition so is visible in the night sky all night long for the whole month. A telescope or good pair of binoculars will help show the four brightest Galilean moons (first discovered by Galileo in January 1610), which can be seen stretched out in a line in our photograph below

Jupiter with three moons to the left (Callisto, Ganymede and Io) and one (Europa) to the right, 1st October 2011 (click to enlarge) - Credit: Sky-Watching/A.Welbourn

Wednesday 2nd November -  First quarter Moon

Saturday 5th November – Tonight is the peak of the Southern Taurid meteor shower. Because of the gravitational effect of planets (particularly Jupiter) the Taurids have become spread out over time, allowing separate streams known as the Southern Taurids and Northern Taurids to be observable on different dates

Tuesday 8th November – Moon at Apogee (406,180 km), the farthest point it reaches on it’s orbit around the Earth. Asteroid 2005 YU55 will make a close pass by the Earth today (closer than the orbit of the Moon) but poses no danger

April's Full Moon looking bright as imaged using a 200mm Newtonian Reflector Telescope (click to enlarge) - Credit: Sky-Watching/A.Welbourn

Thursday 10th November – Full Moon, sometimes called the Beaver Moon or Dark Moon

Saturday 12th November – This evening sees the peak of the Northern Taurid meteor shower, however the recent full Moon (which is very close to the radiant) will obscure all but the brightest ones

Orionid meteor from October - Meteor observing can be addictive, and capturing them in a photo isn't easy (click to enlarge) - Credit: Sky-Watching/A.Welbourn

Thursday 17th/Friday 18th  November – Leonid meteor shower peaks tonight but the waning Moon may be in the way. Its light will block out a lot of the fainter meteors but you should still see some in darker parts of the sky

Leonid meteor shower radiant position at 01:30am 18th November 2011 (click to enlarge) - Credit: Stellarium/Sky-Watching

Friday 18th November – Last quarter Moon

Wednesday 23rd November – Moon at Perigee (359,690 km), the closest point of its orbit around the Earth. As it doesn’t rise until around 05:15 UTC/GMT (and will be only 5% lit) it won’t interfere if you fancy having a look at some deep sky objects.

Orion will be well above the horizon by 22:00 and our perennial favourite M42 (the Orion Nebula) should be a great sight through binoculars or a small telescope. Located in the sword hanging from Orion’s belt, we managed to get a good look at it in October (it’s one of the autumn constellations we always take a peek at when the skies are clear!)

In the brightest part of the Nebula you can see the four stars that make up the "Trapezium Cluster" (click to enlarge) - Credit: Sky-Watching/A.Welbourn

Friday 25th November – New Moon and partial Solar eclipse, though it will only be visible from Antarctica and parts of the Southern Ocean

Sunday 27th November – Saturn is making a welcome return to our skies, and can be see before dawn (rising just before 04:00 UTC/GMT) to the East near the bright star Spica, part of the constellation Virgo

Remember, it can take your eyes up to 20 minutes to become properly dark adapted, and anything up to an hour for a telescope to reach ambient temperature outside (to ensure the best image), so give yourself plenty of time to get set up!

We’ve also added the “Monthly Guide” section in the menu bar to the right (where this guide will appear), so next time you visit you can find it again easily!

Guide images created with Stellarium

Archive:
Astronomy Events – October 2011
Astronomy Events – September 2011
Astronomy Events – August 2011

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Astronomy Events – October 2011

September 30, 2011

by yaska77

Here is a list of upcoming Astronomy events for October. The recent clear warm nights at the end of September have given us the chance to get a look at a few things, but the sky is so big! How do you choose!? Well, this latest guide might just have a few suggestions of interest.

Saturday 1st October – In the early hours of 1st and 2nd October the planet Mars can be found right in front of Praesepe (the Beehive Cluster, Messier 44), in the constellation Cancer. Should be great to see with binoculars or a small telescope!

You can see what this actually looked like in our photographs here  (and compare it to the guide image below!), it was one of many targets on what turned out to be a great night!

Mars in the Beehive Cluster, to the east at 02:30 UTC/GMT 1st October (click to enlarge) - Credit: Stellarium/Sky-Watching

Tuesday 4th October -  First quarter Moon

Saturday 8th October – The annual Draconid meteor shower (also known as the Giacobinids) should reach its peak this evening (the height of activity expected between 16:00 and 22:00 UTC/GMT), with calculations suggesting we could be in for an outstanding display. The ZHR (Zenithal Hourly Rate) could range from a few tens of meteors per hour to several hundred

The image below can help guide your eyes, but if it’s as busy as forecasts are suggesting you should see them all over the sky, despite a bright Moon to the south. It might wash out some of the fainter meteors but you should still see the brighter flashes. Draconid meteors are also known to be very slow moving

The location in the night sky Draconid meteors will appear to originate from

The sky at 20:00 UTC/GMT 8th October 2011, to spot Draconids look to the North West (click to enlarge) - Credit: Stellarium/Sky-Watching

Tuesday 11th/Wednesday 12th October – Full Moon and Moon at Apogee (406,435 km), the farthest it gets away from the Earth during it’s orbit. This full Moon is sometimes known as the Hunter’s Moon or Blood Moon (occurs at 02:05 GMT)

Thursday 13th October – The planet Saturn is in superior conjuction on the far side of the Sun, so will be unobservable throughout October

Monday 17th October -  Tonight should see the start of the annual Orionids meteor shower (17th-25th). The Orionids are considered a universal sky-watching opportunity as the radiant point is close to the celestial equator, meaning both hemispheres (northern and southern) will see some of the display not lost in the Moon’s glare. The peak should be on 21st October with a ZHR of around 20-25 per hour

Orionid meteor radiant at 00:00 21st October (click to enlarge) - Credit: Stellarium/Sky-Watching

Thursday 20th October – Last quarter Moon. It won’t rise until after midnight so a good chance earlier on to maybe catch a few meteors

Wednesday 26th October – New Moon and Moon at Perigee (357,050 km), the closest point of its orbit around the Earth.

Jupiter and moons (left to right: Callisto, Europa, Io and Ganymede) from 28th September 2011 (Click to enlarge) - Credit: Sky-Watching/A.Welbourn

Saturday 29th October -  Jupiter is at opposition in the constellation Aries, meaning it is in the opposite side of the sky to the Sun, and will appear at it’s brightest

Sunday 30th October -  British Summertime ends at 02:00 BST, when the clocks go back 1 hour to 01:00 GMT (but at least I get an extra hour in bed!)

Remember, it can take your eyes up to 20 minutes to become properly dark adapted, and anything up to an hour for a telescope to reach ambient temperature outside (to ensure the best image), so give yourself plenty of time to get set up!

We recently added the “Monthly Guide” section in the menu bar to the right (where this guide will appear), so next time you visit you can find it again easily!

Guide images created with Stellarium

Archive:
Astronomy Events – September 2011
Astronomy Events – August 2011
Astronomy Events – July 2011

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