Stars, Galaxies and The Universe

Front

What is a Black Hole?

Back

A region in space where gravity is so strong that nothing, not even light, can escape from its pull.

Front

Why does the moon look larger than the stars?

Back

The moon is closer to Earth than the stars.

Front

Where do cool, bright, red stars appear on the modern H-R diagram?

Back

Bottom, right.

Front

What kind of galaxy is characterized by spiral arms?

Back

Spiral.

Front

Order the stars from hottest to coolest: Blue, Red, White, Yellow, Orange.

Back

Blue, White, Yellow, Orange, Red.

Front

What is the universe?

Back

The entirety of space, time, matter, energy, and the physical laws and constants that govern them.

Front

What is a galaxy?

Back

A system of stars, stellar remnants, dust, and gas bound together by gravity.

Front

What is the main difference between a star and a planet?

Back

A star generates its own light through nuclear fusion, while a planet reflects light from a star.

Front

What is the life cycle of a star?

Back

A star goes through stages: nebula, main sequence, red giant, and then either a white dwarf, neutron star, or black hole.

Front

What is the significance of the H-R diagram?

Back

It classifies stars based on their luminosity and temperature.