science march 22 2004
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- What is a black dwarf?
- The cold, dark, body that is the final stage in the life cycle of a low-mass star.
- What is a black hole?
- an extremely dense, invisible object in space whose gravity is so great that not even light can escape it
- what is a galaxy?
- a vast group of billions of stars that are held together by gravity
- what is a light year
- a unit of measurement representing the distance that light travels in one year
- what is a nebula?
- a huge cloud of dust and gas found in space
- what is a neutron star?
- the remains of a massive star that has exploded in a supernova
- what is absolute magnitude?
- the measure of a star's brightness based on the amount of light it actually gives off
- what is apparent magnitude?
- the measure of a star's brightness as seen from Earth
- what is the milky way galaxy?
- a gigantic cluster of billions of stars that is ome to our solar system
- what is a protester?
- a concentration of matter found in space that is the beginning of a star
- what is a red giant?
- a very large old reddish star that has greatly expanded and cooled as its fuel has begun to run out
- what is a supernova?
- an exploding star
- what is the universe?
- the sum of everything that exists