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What's Happening at Insight Observatory...

Saturday, May 18, 2013

The Galaxy Project - What Lies Beyond Our Stars

Ms. Campbell's 6th-grade class at Plymouth Community Intermediate School in Plymouth, Massachusetts, was part of an exciting collaboration with the W. Russell Blake Planetarium and the Insight Observatory to image objects beyond the visible stars in our night sky. The students were given access to high-powered remote robotic telescopes for astronomy education located in New Mexico and Spain, facilitated by Insight Observatory. Each group was asked to image an item in deep space found near the patch of sky containing the constellations of Ursa Major, Leo, Coma Berenices, Canes Venatici, and Virgo.

Display of Galaxies Imaged by PCIS Students
Display of Galaxies Imaged by PCIS Students

The images that the students took of galaxies, a globular cluster, and a planetary nebula are breathtaking!  A large printout of the night sky, along with the students' images, is on display near the entrance of the planetarium. This hands-on experience not only taught the students a great deal about remote imaging with a telescope, but it also enabled them to grasp the profoundness of the images they captured.

Special thanks to Monica Ares, Planetarium Program Instructor, Michael Petrasko, Insight Observatory Project Developer, and Kellianne Campbell, 6th Grade Teacher at PCIS. Together, they designed this amazing opportunity for our students that they hope will grow in the years to come. Below are a few of the images the students acquired by using a 17" telescope remotely in Mayhill, New Mexico, with all image exposure times at 5 minutes. You can view all of the images the students acquired on the Insight Observatory's Image Gallery page.

M51 - Image by Mark R. & Peter H.
M51 - Image by Mark R. & Peter H.

The Whirlpool Galaxy (also known as NGC 5194) is an interacting grand-design spiral galaxy in the constellation Canes Venatici. Recently, it is estimated to be 15 and 35 million light-years from our own Milky Way Galaxy. The galaxy and its companion (NGC 5195) are easily observed by amateur astronomers, and the two galaxies may even be seen with binoculars under dark skies and good seeing conditions. The Whirlpool Galaxy is also a popular target for professional astronomers, who study it to further understand galaxy structure (particularly structure associated with the spiral arms) and galaxy interactions.  

M97 - Image by Bianca T. & Cassidy B.
M97 - Image by Bianca T. & Cassidy B.

The Owl Nebula (also known as Messier 97, NGC 3587) is a planetary nebula in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781. M97 is regarded as one of the more complex of the planetaries. The 16th magnitude central star has about 0.7 solar mass, and the nebula itself has about 0.15 solar mass. The nebula formed roughly 6,000 years ago. The nebula gets its name from the appearance of owl-like "eyes" when viewed through a large 200mm telescope under dark sky conditions with the aid of a so-called "nebula filter." The eyes are also (albeit not so easily) visible in photographs of the nebula.

NGC 4565 - Image by Olivia F. & Nachelle S.
NGC 4565 - Image by Olivia F. & Nachelle S.

NGC 4565 (also known as the Needle Galaxy or Caldwell 38) is an edge-on spiral galaxy about 30 to 50 million light-years away in the constellation Coma Berenices. The 10th magnitude galaxy sits perpendicular to our own Milky Way galaxy and is almost directly above the North Galactic Pole (in the same way Polaris is located above the North Pole). It is known as the Needle Galaxy for its narrow profile. First spotted in 1785 by Sir William Herschel (1738–1822), this is one of the most famous examples of an edge-on spiral galaxy. "Visible through a small telescope, some sky enthusiasts consider NGC 4565 to be a prominent celestial masterpiece Messier missed."
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Saturday, April 27, 2013

One Shot Color of Carina Nebula

The southern hemisphere is full of "deep-sky wonders" as much as the northern hemisphere. Having access to remote robotic telescopes in locations such as New South Wales, Australia, allows us, northern hemisphere observers, to image and research a whole new frontier. Here is an image of NGC 3372, The "Carina Nebula" captured by Michael Petrasko on the evening of April 26, 2013 (local time NSW). This image was taken with a full moon in the sky at the time. It's clearly evident that there is no "washout" from the light of the moon whatsoever.

NGC 3372 - Carina Nebula imaged by Michael Petrasko
NGC 3372 - Carina Nebula imaged by Michael Petrasko

The Carina Nebula (also known as the Great Nebula in Carina, the Eta Carina Nebula, or NGC 3372, as well as "Grand Nebula") is a large bright nebula that surrounds several open clusters of stars. Eta Carinae and HD 93129A, two of the most massive and luminous stars in our Milky Way galaxy, are among them. The nebula lies at an estimated distance between 6,500 and 10,000 light-years from Earth. It appears in the constellation of Carina and is located in the Carina–Sagittarius Arm.

The Carina Nebula is one of the largest diffuse nebulae in our skies. Although it is some four times as large and even brighter than the famous Orion Nebula, the Carina Nebula is much less well known, due to its location far in the Southern Hemisphere. It was discovered by Nicolas Louis de Lacaille in 1751–52 from the Cape of Good Hope.

The image is a 15-minute exposure taken with an SBIG ST2000XMC One-Shot Color CCD camera through a Takahashi SKY90 3" (90mm) Apochromatic Refractor (pictured left) provided by iTelescope.net. Processing was done with SBIG CCDOps software and Adobe Photoshop CS6. 3x5 images were stacked with 3 synthetic luminance images created from each color image for noise reduction.

A one-shot color CCD camera can provide interesting images (if processed properly with synthetic luminance images) just as well, if not better, than high-end monochrome CCD cameras that use Red, Green, and Blue color filters.
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Monday, March 25, 2013

The Great Globular Cluster in Hercules on a Moonlit Morning

After experimenting with iTelescope.net's remote robotic telescopes for astronomy education, imaging galaxies, and galaxy clusters, I figured it was now a good time to target another type of deep-sky object. First thing this morning around 3:00am, MDT, Telescope T-21 (Planewave 17" f/4.5 CDK) was available for imaging at New Mexico Skies. The moon's phase was near full in the western part of the sky and Messier 13 (M13), the Great Globular Cluster in Hercules was becoming high in the eastern part of the sky. This was my first attempt at imaging a deep-sky object when the moon was so bright using these telescopes. 

Image of M13 - Globular Cluster in Hercules - 300 Second Exposure
M13 - Globular Cluster in Hercules - 300-Second Exposure

After making a 5-minute exposure with only a luminance filter, the result is what you see to the left. I used the FITS Liberator and Adobe Photoshop CS6 for post-processing. I converted the FITS-processed grayscale image to RGB in Photoshop and added a blueish hue to the image for effect.

I find it absolutely amazing that when there is nearly a full moon in the night sky, observers are still able to take images of deep-sky objects with no interference from the moonlight. As I referred to the "All-Sky Camera" at New Mexico Skies to check the sky conditions before imaging, I could barely make out only a few of the brightest stars accompanied by an overexposed view of the moon. Also, because of today's technology with advanced CCD Cameras and precision mounts that track the sky so accurately, it only takes about 5 minutes to get an image like the one above.

Messier 13 (M13), also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of about 300,000 stars in the constellation of Hercules.M13 is about 145 light-years in diameter, and it is composed of several hundred thousand stars, the brightest of which is the variable star V11 with an apparent magnitude of 11.95. M13 is 25,100 light-years away from Earth. 13 was discovered by Edmond Halley in 1714, and cataloged by Charles Messier on June 1, 1764. The Arecibo message of 1974, containing encoded information about the human race, DNA, atomic numbers, and Earth's position, was beamed there for being picked up by a potential extraterrestrial civilization. It will reach the cluster in 25,000 years.
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