According to Dictionary.com a supernova is…
“the explosion of a star, possibly caused by gravitational collapse, during which the star’s luminosity increases by as much as 20 magnitudes and most of the star’s mass is blown away at very high velocity, sometimes leaving behind an extremely dense core.”
Not only are supernovas an interesting and cool concept but, supernovas are an important process in our solar system, galaxy, and universe. In fact, supernovas have had a large influence in shaping our solar system and galaxy.
Below is a simple video by NASA that helps explain and show the concept behind why supernovas create such a high velocity explosion.
Yesterday, Space.com published this great infographic which highlights some of the most awesome space-related phenomenon and events that will be happening this year.
Skywatchers: mark your calenders! (Click on infographic to enlarge)
A team of scientists from the University of Texas and Texas A&M put aside old football rivalries in the name of science to discover the furthest galaxy ever seen from Earth (z8_GND_5296 is its catalog name, it has yet to be given a common name). Because of the fact that 1. the universe is always expanding and 2. light travels at a finite speed, the massive distance between us and the galaxy means that what we are seeing is the galaxy 13 billion years ago- that is how long it has taken for the light of that galaxy to reach us. So the researchers get to see a snapshot of what the universe looked like when it was only about 700 million years old (it’s around 13.8 billion years old now).
Here is what the galaxy looks like through the Hubble Telescope:
The galaxy appears red because of the phenomenon known as “red-shift” in which the blue light emitted by stars get shifted toward redder colors because of the expansion of the universe and its large distance from Earth. The image at the top is an artist rendition of what the galaxy looks like up close.
(to read the full story, click the link below)
Most Distant (And Therefore Oldest) Galaxy Discovered