Astronomy Vocabulary Crossword

A star with a mass of 0.5 to 8 times that of Earth's Sun and spend most if its time in the main sequence.
A region of space that no radiation or light can escape. Caused by the collapse of a massive star.
A galaxy shaped like an oval (football shaped).
A group of solar systems, gas, and dust held together by gravity.
A galaxy with no specific shape or structure.
The distance that light travels in one year when contained in a vacuum.
A large spiral galaxy made of about 100 billion stars. Our sun and its solar system is located in the minor Orion arm in this galaxy.
Formed by the gravitational collapse of the remnant of a massive star after a supernova explosion, provided that the star is insufficiently massive to produce a black hole.
The Milky Way is an example of this galaxy.
A massive ball of gas in outer space that gives off heat, light and other forms of radiation.
A star that suddenly increases greatly.