GEI 1 - U4A - Vocabulary

The Milky Way is just one of the ______ of galaxies in the universe.

• billions

• remnants

• celestial

A ______ is a region in space where gravity is so strong that nothing, not even light, can escape it.

• distant

• visible

• black hole

When stars die, they leave behind ______ that can sometimes form new stars.

• accretion

• remnants

• nebulae

______ is the process by which particles come together under gravity to form larger bodies.

• accretion

• emission

• discovery

The Andromeda galaxy, our closest galactic neighbor, is so ______ from us that its light takes over two million years to reach us.

• distant

• massive

• visible

The planet ______ in the habitable zone of its star system, where conditions are just right for life.

• resides

• discovered

• emit

The Crab Nebula is one of the most famous ______ in the night sky.

• galaxies

• celestial

• nebulae

Stars ______ light and heat as a result of nuclear fusion in their cores.

• discovered

• emit

• visible

Astronomers have ______ thousands of exoplanets orbiting other stars.

• discovered

• distant

• visible

Many ______ galaxies are observed through telescopes, each containing millions of stars.

• celestial

• massive

• remnants