Test Tues Feb. 18th Unit 7 Universe and Stars Vocab. Flash Cards

Front

What is the measure of how bright a star would be if it were seen from a standard distance?

Back

Absolute magnitude

Front

What is the brightness of a star as seen from Earth called?

Back

Apparent magnitude

Front

What unit is used to measure distances in the Solar System?

Back

Astronomical unit

Front

What is a collection of stars, dust, and gas bound together by gravity?

Back

Galaxy

Front

What is the distance that electromagnetic radiation travels in one year?

Back

Light year

Front

What is a natural object that orbits a planet?

Back

Moon

Front

What is a large spherical body in space that orbits a star and does not produce its own light?

Back

Planet

Front

What is a loop of relatively cool, incandescent gas that extends above the photosphere?

Back

Prominence

Front

What is an explosive release of energy from the Sun associated with magnetic disturbances?

Back

Solar flare

Front

What is a system of planets and other bodies that orbit a star?

Back

Solar system