Closest Supernova In Years Brings Cosmic Fireworks To Earth's Skies (Synopsis)

"When a massive star explodes at the end of its life, the explosion dispenses different elements-helium, carbon, oxygen, iron, nickel-across the universe, scattering stardust. That stardust now makes up the planets, including ours." -Michelle Cuevas

Every once in a while, a new light appears somewhere in the night sky: the result of a massive star reaching the end of its life. From many millions of light years away, the brilliance of a supernova shines across the cosmos. Just a few days ago, a new light was discovered in a galaxy only 22 million light years away, making it the closest supernova discovered in three years.

The galaxy NGC 6946, supernova SN 2017eaw (denoted with red markings) and the open star cluster NGC 6939. Although the galaxy and the cluster take up the same approximate area on the sky, the galaxy is 22 million light years away, while the star cluster is within our own galaxy at a mere 3860 light years distant. Image credit: Gianluca Masi / virtualtelescope.eu.

The galaxy housing it is a hotbed of supernova formation, having been home to ten such explosions in the past 100 years: more than we’ve found in any other galaxy. The reason? This entire galaxy, despite having only half the stars of the Milky Way, is a giant star-forming region. Starburst galaxies like this are the best place to look for cataclysmic events like this, and NGC 6946 is maybe the best example of all.

A composite of X-ray (Chandra) and optical (Gemini) data show the extent of the star forming regions of the Fireworks galaxy, NGC 6946. Image credit: X-ray: NASA/CXC/MSSL/R.Soria et al, Optical: AURA/Gemini OBs.

Come see the night sky’s newest, closest supernova, and learn how to see it for yourself!

More like this

"Modern man must descend the spiral of his own absurdity to the lowest point; only then can he look beyond it." -Vaclav Havel But the spiral is more than a metaphor or a mathematical shape, it's also the most common feature observed in the galaxies out there in the Universe. There are 27 spiral…
"How is it they live for eons in such harmony - the billions of stars - when most men can barely go a minute without declaring war in their mind against someone they know?" -Thomas Aquinas Welcome back to another Messier Monday here on Starts With a Bang! Each Monday, we take an in-depth look at…
"We don’t understand how a single star forms, yet we want to understand how 10 billion stars form." -Carlos Frenk The Universe has been around for a long time: nearly 14 billion years, to the best of our knowledge. When it was very young, there were absolutely zero stars in it, while today, there…
"When I had satisfied myself that no star of that kind had ever shone before, I was led into such perplexity by the unbelievability of the thing that I began to doubt the faith of my own eyes." -Tycho Brahe When we look out at galaxies throughout the Universe, we find that every so often -- about…

In the somewhat related topic of firing up some star creation here in the Milky War, one of the simulations Nvidia did when testing their new processor was to model the collision of Andromeda with the Milky Way. If you'd like to see it, the video is below. The simulation starts at around the 5:21 mark. Spoiler Alert, the galaxies do merge but we won't be part of it. Our solar system is going to be flung off into the universe about 5 billion years from now.

https://www.youtube.com/watch?v=0PyL5M3ekKc

I saw that presentation couple of months ago. A more interesting part of it, to me, was trying to recreate the moon landing photo, with all the light paths etc.. and thus showing that indeed it was taken on the moon ;)

By Sinisa Lazarek (not verified) on 17 May 2017 #permalink