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Showing posts with label m51. Show all posts
Showing posts with label m51. Show all posts

Monday, February 1, 2021

What's In The Sky - February 2021

Clear February nights present some great stargazing opportunities, as suggested here by Orion Telescopes and Binoculars. Be sure to bundle up and keep warm while you get outside for some stargazing fun!

M81 - The Cigar Galaxy and M82 - Bode's Galaxy in Ursa Major. Image processed by Insight Observatory Starbase subscriber, Daniel Nobre from image data acquired on the 16" f/3.7 Dream astrograph reflector (ATEO-1).
M81 - The Cigar Galaxy and M82 - Bode's Galaxy in Ursa Major. Image processed by Insight Observatory Starbase subscriber, Daniel Nobre, from image data acquired on the 16" f/3.7 Dream astrograph reflector (ATEO-1).

Bright Galaxies

In late February, bright galaxies M81 and M82 will be about as high in the sky as they will get for North American stargazers. From a dark sky site, these galaxies are visible with a 50mm or larger binocular, but we suggest you use a large telescope to chase these galaxies down just off the leading edge of the Big Dipper asterism. Many observers consider M81 and M82 the best pairing of visual galaxies in the sky!

M31 - The Andromeda Galaxy (left) processed by Utkarsh Mishra and M45 processed by Chris Lin both imaged on ATEO-1 using Insight Observatory's online Personal Image Request (PIR) application.
M31 - The Andromeda Galaxy (left) was processed by Utkarsh Mishra, and M45 was processed by Chris Lin, both imaged on ATEO-1 using Insight Observatory's online Personal Image Request (PIR) application.

Binocular Targets

Astronomy isn't always about how much gear you have! Grab some Astro binoculars and check out the night sky without a lot of equipment. The Andromeda Galaxy (M31) is high in the sky in the evening right now, with the Pleiades (M45) higher up. Both make great targets for almost any binocular!

The conjunction of Venus and Jupiter

On February 11th, there is a conjunction between Venus and Jupiter in the early morning just before sunrise. With a separation of 0.5 degrees, the pair will be close enough together to fit into the field of view of most telescopes with around 75x-100x magnification. Plus, with Saturn still nearby, it's a great morning for planetary viewing. Get up early, find a clear southeastern horizon, and see if you can get a good view before sunrise!

M104 - The Sombrero Galaxy in Virgo (left) and M51 - The Whirlpool Galaxy in Canes Venatici (right) both imaged on ATEO-1 by Charles Weaver using Insight Observatory's online Personal Image Request (PIR) application.
M104 - The Sombrero Galaxy in Virgo (left) and M51 - The Whirlpool Galaxy in Canes Venatici (right), both imaged on ATEO-1 by Charles Weaver using Insight Observatory's online Personal Image Request (PIR) application.

Midnight Spirals

Some galaxies for the night owls, the Sombrero Galaxy (M104) and the Whirlpool Galaxy (M51), are some nice spiral galaxies that are both visible after midnight in February. The spiral arms of M51 can be glimpsed under dark skies with a 4.5" telescope, but will have more definition in larger telescopes. M104 is similar; it is visible in a 4" telescope, but to distinguish the central "bulge" and 8" or larger instrument is required.

All objects described above can easily be seen with the suggested equipment from a dark sky site, a viewing location some distance away from city lights, where light pollution and bright moonlight do not overpower the stars.
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Monday, June 1, 2020

What's In The Sky - June 2020

Get ready for summer stargazing! With the weather warming up, June is a great time of year to enjoy relaxing evenings under starry skies with your telescope or astronomy binoculars. Here are a few of Orion Telescopes and Binoculars' top picks for June 2020 stargazing and observing:

Solar System Trio

Rising in the southeast on June 7th and 8th, Jupiter, Saturn, and the Moon are well placed for observation, with 5 degrees of separation between Jupiter and Saturn. On the 7th the Moon approaches Jupiter with a separation of 6 degrees, and on the 8th it is 4.5 degrees away from Saturn. They will rise around 11pm, and reach their highest point in the sky around 4am, providing ample observing time. Grab a planetary guide set to identify surface details or a Barlow lens for high-magnification viewing!

M13 - The Great Globular Cluster in Hercules imaged on Insight Observatory's 16" f/3.7 astrograph reflector (ATEO-1). Image data acquired by Muir Evenden and processed by Utkarsh Mishra.
M13 - The Great Globular Cluster in Hercules imaged on Insight Observatory's 16" f/3.7 astrograph reflector (ATEO-1). Image data was acquired by Muir Evenden and processed by Utkarsh Mishra.

Summer is the Globular Season!

Globular star clusters are densely packed balls of stars that are concentrated toward the center of the Milky Way. June skies offer some of the finest globular cluster viewing opportunities. While you can detect most globular clusters in 50mm or larger binoculars, a moderate to the high-power eyepiece in a 6" or larger telescope offers the best chance to resolve individual stars. In the constellation Hercules, look for M92 and the "Great Cluster" M13. In Scorpius, look for M4 and M80. The constellation Ophiuchus is home to six globulars - M10, M12, M14, M107, M9, and M19. Can you spot them all?

Summertime Staycation

Take advantage of the New Moon on June 20th and the galaxies and globular clusters visible for a great Staycation at home! Not only will the dark skies of the moonless night provide great opportunities to see fainter objects more clearly, but the warm June weather will make it easy to enjoy starry sights all night long. The New Moon also brings an annular solar eclipse, but this is only visible from parts of Africa and Asia.

M51 - The Whirlpool Galaxy in Canes Venatici (left) and M101 - The Pinwheel Galaxy (right) in Ursa Major imaged on Insight Observatory's ATEO-1 by Michael Petrasko (M51) and Utkarsh Mishra (M101).
M51 - The Whirlpool Galaxy in Canes Venatici (left) and M101 - The Pinwheel Galaxy (right) in Ursa Major imaged on Insight Observatory's ATEO-1 by Michael Petrasko (M51) and Utkarsh Mishra (M101). 

Swirling Spirals

Around 10pm in mid-June, two glorious, face-on spiral galaxies M51 and M101 will both be in a great position for viewing and imaging. Look for M51, the Whirlpool Galaxy, to the southwest of the star Alkaid at the end of the Big Dipper's "handle". Scan the sky to the northeast of Alkaid to find M101, the Pinwheel Galaxy. Under very dark skies, these distant galaxies can barely be detected in smaller telescopes, but a 10" or larger reflector will reveal much more impressive views. If you're viewing from an especially dark location, try to resolve the delicate spiral arms of M51 in a 10" or larger telescope.


Orion Telescopes and Binoculars 10" Dobsonian Telescopes
Orion Telescopes and Binoculars 10" Dobsonian Telescopes

Gems of the Summer Triangle

By 10pm in mid-northern latitudes, the Summer Triangle, comprising beacon stars Vega (in Lyra), Deneb (in Cygnus), and Altair (in Aquila), will be fully visible above the horizon. Several celestial gems lie within its confines, including the Ring Nebula (M57), the Dumbbell Nebula (M27), open star cluster M29, and the visually challenging Crescent Nebula (NGC 6888). To catch a glimpse of the elusive Crescent, you'll almost certainly need an Orion Oxygen-III Filter in a larger telescope.

Summer Sky Challenge

Discovered in 1825 by the German astronomer Friedrich Georg Wilhelm von Struve, NGC 6572 is bright enough to be seen in a humble 60mm refractor telescope from a dark sky site; but it is very, very small! At only 8 arc seconds in size, it takes a lot of magnification to distinguish this from a star. The easiest way to find it is to look in the target area for a green star. NGC 6572 is one of the most intensely colored objects in the night sky. Some say this is green, and some say it is blue; what do you think?

All objects described above can easily be seen with the suggested equipment from a dark sky site, a viewing location some distance away from city lights where light pollution and when bright moonlight does not overpower the stars.
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Monday, May 11, 2020

The O-TEAM: A Thousand and One Nights - Part 2

Once upon a time, at a tiny cul-de-sac, in the village of North Falmouth, Cape Cod, Mass -

"This morning - was something to remember"...

So the note goes, written in pencil, on an official Edmund Scientific observing notes template, on the warm, sunny morning of 8 May 1983, by one, Mike Petrasko - one-third, of that notorious 3-member "gang" of optical aficionados, the "O-Team".

But, I think the tone of the note, was an understatement;

as observing sessions go, this one was outstanding, on several accounts! We had a guest for this session, a friend of Mike's, Shawn, who had never really had an opportunity, before this, to observe the sky with a telescope (and - he may not have, since!)

Graphic of O-Team members telescopes at Camelot Court


I arrived, on location, at around 2:00am. The others - Mike, Muir, and Shawn, were just waking from a short night's sleep, camped out at the center of an unused, undeveloped, someday-to-be, cul-de-sac neighborhood called, "Camelot Court", in North Falmouth, Mass. We had chosen this location for its proximity, open view of the sky, and, for its relative isolation from outdoor lighting - and other, unwelcomed intrusions.

In the span of 3 hours of telescope time, we had assessed, 5 Messier objects, an unknown open cluster, an unknown globular cluster (to us, at the time), and 8 sporadic meteors.

The wee hours of the night present some of the best opportunities for the amateur observational astronomer: fewer episodes of sporadic lighting, fewer people, less traffic, increased meteor activity, and, most of all, quiet.

M57, The Ring Nebula in Lyra imaged on ATEO-1 processed by Utkarsh Mishra (left) and M27, The Dumbell Nebula in Vulpecula imaged on ATEO-1 processed by Michael Petrasko.
M57, The Ring Nebula in Lyra imaged on ATEO-1 processed by Utkarsh Mishra (left), and M27, The Dumbell Nebula in Vulpecula imaged on ATEO-1 processed by Michael Petrasko (right).

Our, "optical ambush", begins with M57 - the "Ring" nebula, in Lyra. Though this emission nebulosity does, indeed, appear ring-like through the eyepiece, that is an illusion of perspective. This structure is, in reality, a spherical shell of excited gas molecules, outlining the shock bow from a centralized supernova event. M56, to me, has always appeared to be, a lone "Cheerio", floating in the darkness! It sits, almost squarely, between the two, lower corner stars of the "lyre" shape, Gamma and Beta Lyrae. It can be observed well with a 4" telescope.

The next object was M27, in Vulpecula - the "Dumbbell" nebula.

This, also, can be seen easily in a 4" inch scope. I know this, because Mike had a 4" Edmund Scientific Astroscan, at the time, and usually found these objects before I did. It is a twin-lobed remnant, also of a supernova. Burnham's Celestial Handbook describes it as, "large and shining", at several times the size of M57. About then, we broke out some nutrition to keep up our ambitions: "Nutty Bars", "M&M's" (plain), and a bag of "Doritos". Now, there's some "energy food"!

Edmund Scientific's Astroscan 4" f/4.2 reflector telescope (left) with the original observing log entry this post was adapted from back on May 8th, 1983 written by Insight Observatory Co-Founder Michael Petrasko when he was 17 years old. Image credits: Astroscan - Glenn Votava, Observers Log - Dale Alan Bryant.
Edmund Scientific's Astroscan 4" f/4.2 reflector telescope (left) with the original observing log entry this post was adapted from back on May 8th, 1983 written by Insight Observatory Co-Founder Michael Petrasko when he was 17 years old. Image credits: Astroscan - Glenn Votava, Observers Log - Dale Alan Bryant.

Next on our list was M13 - the Hercules cluster (globular cluster, not referring to the cluster of galaxies within that constellation). Easily seen in good binoculars, this is one of my favorite collections. Of stars, that is. A nearly, perfectly symmetrical, uniformly dense, globe-shaped cluster of stars within the halo of globular clusters that orbits the Milky Way galaxy. Well, that's a technical description – but, see it for yourself, and you'll likely choose other, more prosaic wording, I'm sure of it.

M11 - is an open star cluster in the constellations Scutum. Open star clusters are loose congregations of stars, bound together, gravitationally, as are globular clusters, only, not as tightly. It's commonly called, the "Wild Duck" cluster (for reasons I never quite grasped). I have a favorite open cluster, not on this list: the double cluster, NGC'S 864 and 889, in Perseus. At over 7,000 light-years, the stars in the cluster appear as tiny, brilliant, and colorful jewels.

M13, The Great Hercules Globular Cluster imaged on ATEO-1 processed by Utkarsh Mishra (left) and M51, The Whirlpool Galaxy in Canes Venatici imaged on ATEO-1 processed by Michael Petrasko (right).
M13, The Great Hercules Globular Cluster imaged on ATEO-1 processed by Utkarsh Mishra (left), and M51, The Whirlpool Galaxy in Canes Venatici imaged on ATEO-1 processed by Michael Petrasko (right).

Next up, M51 - the "Whirlpool" galaxy. M51 is another "Grand Design" spiral galaxy, in reference to its near-perfection. Actually, it's an interactive pair of galaxies - the larger one, slowly consuming the smaller of the two. Located in Canes Venatici, its brightness and relative isolation in the darkness make it an easy target for small scopes.

As for the unknown open and globular clusters, I could only guess at what they would have been; likely, something in Ophiuchus - an area, rich, in such wonders.

And that leaves eight meteors; possibly, or not, connected to the Eta Aquarid meteor shower. Meteors are a fascinating subject, all on their own. The months of April and May have, historically, produced some very large fireballs and bolides, in historic times. Ask Mike or me, about that, sometime!

Dale Alan Bryant
Senior Contributing Science Writer
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