Astronomy quiz 3

What is absolute magnitude?

Absolute magnitude is how bright a star would be if it were at the standard distance of 10 parsecs.

What is a light year?

A light year is the distance light travels in one year, about 5.88 trillion miles or 9.46 trillion kilometers.

What is a parsec?

A parsec is an astronomical unit of measurement equal to 3.26 light-years or roughly 19 trillion miles.

What is a white dwarf star?

A white dwarf is a dense, small star that remains after a low-mass star burns all its nuclear fuel.

What is an extrasolar planet?

An exoplanet orbits a star outside our solar system.

What is a transit in astronomy?

Transit in astronomy is when a celestial object passes between an observer and a larger body, like a planet passing in front of a star.

What is a habitable zone?

A habitable zone is where liquid water can exist on a planet's surface due to favorable conditions around a star.

What are star clusters?

Star clusters are groups of stars held by gravity and formed from the same molecular cloud.

What is the interstellar medium?

Interstellar medium is matter and radiation in space between stars.

What is the Local Group?

The Local Group is a group of galaxies that includes the Milky Way and about 54 other galaxies, most of which are dwarf galaxies.