Question

1. study of evolution of universe
2. (magnitude) brightness of a star as seen from earth
3. collection of stars, dust, a& gas bound by gravity
4. star that suddenly becomes brighter
5. star that collapsed under gravity, forms neutrons.
6. (magnitude) brightness of a star 32.6 ly from earth
7. where most stars are found on h - r diagram
8. cloud of dust & gas, where stars are born.

down

1. rapidly spinning neutron star emits radio & optical energy
2. theory that supports the formation of the universe
3. small hot dim star, leftover center of an old sunlike star
4. change in frequency when source/observer is moving
5. apparent shift in position of object when viewed from different locations
6. very large and bright star has a hot core, used up most of its hydrogen
7. group of stars organized into a recognizable pattern
8. distance light travels in a year
9. object so massive that light cant even escape its gravity
10. body composed of gas that emits light
11. very luminous object that produces energy at a high rate

Explanation:

This is a set of astronomy - related definitions for a crossword puzzle. Each description corresponds to a well - known astronomical term. For example, the study of the evolution of the universe is cosmology, a rapidly spinning neutron star that emits radio and optical energy is a pulsar, etc.

Answer:

Across:

1. Cosmology
2. Apparent magnitude
3. Galaxy
4. Nova
5. Neutron star
6. Absolute magnitude
7. Main sequence
8. Nebula

Down:

1. Pulsar
2. Big - bang theory
3. White dwarf
4. Doppler effect
5. Parallax
6. Red giant
7. Constellation
8. Light - year
9. Black hole
10. Star
11. Quasar