Astronomy Flashcard EL

Front

What is a high mass star after the main sequence?

Back

A high mass star becomes a supergiant after the main sequence.

Front

How long ago did the Big Bang occur?

Back

The Big Bang occurred 13.8 billion years ago.

Front

What is left behind after a supernova event?

Back

After a supernova event, either a neutron star or a black hole is left behind.

Front

What season is number 2 in the Southern Hemisphere?

Back

The second season in the Southern Hemisphere is fall.

Front

Where do all stars begin their life?

Back

All stars begin their life in a nebula.

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, where stars are born.

Front

What is a supergiant star?

Back

A supergiant star is a very large star that is much brighter than a main sequence star.

Front

What is a neutron star?

Back

A neutron star is the remnants of a supernova explosion, extremely dense and composed mostly of neutrons.

Front

What is a black hole?

Back

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages: nebula, main sequence, red giant/supergiant, and then either a neutron star, black hole, or white dwarf.