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Spiral Galaxy(NGC 1637) & Spiral Galaxy (NGC 6503)
Alisha Langeveld & Katie Vilanova

NGC 1637 NGC 6503
NGC 1637 - Alisha Langeveld NGC 6503 - Katie Vilanova

According to Jeffery Bennet, Megan Donahue, Nicholas Schneider, and Mark Voit authors of the textbook Cosmic Perspective Fundamentals defines Galaxy as " A great island of stars in space, containing millions, billions, or trillions of stars, all held together by gravity and orbiting a common center" (Bennet, 2014).

The first galaxy is a spiral galaxy; A spiral galaxy according to Bennet, Donahue, Schneider, and Voit is "Galaxies that look like flat white disks with yellowish bulges at their centers. The disks are filled with cool gas and dust, interspersed with hotter ionized gas, and usually display beautiful spiral arms" (Bennet. 2014). In 1999 the supernova of the spiral galaxy of NGC 1637 was discovered in the Lick Observatory in Califonia. The constellation of this spiral galaxy is found in is Eridanus. The distance of this galaxy is 29.9 million light years away. The angular diameter of this galaxy is 4.0 x 3.2 arcminutes.

The second galaxy is also a spiral galaxy. The galaxy named NGC 6503 is located on the edge of the Local Void. The Local Void according to hubblesite is "a huge volume of space that is at least 150 million light-years across that doesn't seen to contain anything much" (Calzetti, 2015) NGC 6503 is a dwarf spiral galaxy that spans 30,000 light years. It is in the constellation of Draco, which is 17 million light years away. It is considered a very bright and colorful galaxy with its "bright red patches of gas that can be seen scattered through its spiral arms, bright blue regions that contain newly forming stars and dark brown dust lanes that snake across the galaxy's bright arms and center, giving it a mottled appearance" (NGC 6503, 2013).

Both of the these galaxies are spiral and are considered beautiful to the human eye. NGC 1637 and 6503 have bright blue regions that contain newly formed stars. They are both very asymmetrical galaxies defined by their distinctive shapes.

While both galaxies are similar, they also have their own distinctive differences. NGC 1637 is a super nova spiral galaxy while NGC 6503 is a dwarf spiral galaxy. NGC 6503 is also very unique considering it is "a lone galaxy lost in space" according to Astronomy Now. While NGC 6503 is certainly interesting, NGC 1637 is special in its own right, as one is even able to see its distinctive colors through small telescopes and is considered one of the best studied supernovae in its time.


Bennet, J., Donahue, M., Schneider, N., & Voit, M. (2014). Cosmic Perspective Fundamentals (2nd ed.). N.p.: Pearson Education.

Calzetti, D., and H. Ford. "Lonely Galaxy 'Lost in Space'" HubbleSite. Hubble Heritage, 10 June 2015. Web. 01 Dec. 2015.

Hook, Richard. "Spiral Beauty Graced by Fading Supernova." ESO, 20 Mar. 2013. Web. 01 Dec. 2015.

"NGC 6503: A Lone Galaxy Lost in Space." Astronomy Now. Pole Star Publication LTD, Aug. 2013. Web. 01 Dec. 2015.

Plait, Phil. "How Much Is a Supernova Worth?" Slate. Slate Group LLC, 21 Mar. 2013. Web. 01 Dec. 2015..

Wikipedia. "NGC 1637"

Object NGC 1637 NGC 6503
Right Ascension (J2000) 04:41:28 17:49:04
Declination (J2000) -02:51:28 +70:09
Filters used B (Blue), C (Clear), R (Red), V (Green) B (Blue), C (Clear), R (Red), V (Green)
Exposure time per filter C and B (370s), V (362s) and R (175s) C and B (370s), V (362s) and R (175s)
Image dimension 3.3 x 2.7 arcminutes 6.2 x 10.2 arcminutes
Date/time observed Septermber 29, 2015 5:30am October 1, 2015 12:50 am





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