NS2 Test Bank: NS2-M3C17 - The Stars

Front

Planets orbiting distant stars, distinguished by a wobbling movement or a minor periodic dimming

Back

Exoplanet, or extrasolar planet

Front

A variable star in which changes in brightness are due to alternate contractions and expansions in volume

Back

Cepheid variable, or pulsating star

Front

Massive, extremely luminous stars, with absolute magnitudes in the negative range

Back

Supergiant

Front

Galaxy distinguished by its lack of a well-defined shape

Back

Irregular galaxy

Front

An expanding shell of thinly ionized gas that is ejected from and surrounds a hot, dying star of about the same mass as the Sun

Back

Nebula

Front

Exoplanets that roam freely through interstellar space, away from any central stars; also called interstellar planets

Back

Rogue planet

Front

The brightness of a star as it would appear to a hypothetical observer at a standard distance of 10 parsecs or 32.6 lightyears away

Back

Absolute magnitude

Front

The distance traversed by light in one mean solar year, about 5.88 trillion miles; used as a unit in measuring stellar distance

Back

Lightyear

Front

The explosion of a star, possibly caused by gravitational collapse; most of the star's mass is blown away at very high velocity, leaving behind an extremely dense core.

Back

Supernova

Front

A large group of stars, drawn together due to gravitational attraction.

Back

Star clusters