Metallic, rocky objects without atmospheres that orbit the Sun but are too small to be classified as planets or dwarf planets.

A group of billions of stars held together by gravity

Small objects primarily made of dust and ice that orbit the Sun.

A giant cloud of dust and gas in space.

A celsdtial body that orbits a star, has enough mass to be a sphere, HAS NOT cleared its orbit of smaller objects, and is not be a moon.

Giant collection of glowing gases at high temperatures.

A measure of the DISTANCE light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.

Astronomical Unit (AU)

a measure of the average distance of Earth from the sun. That’s about 93 million miles, 150 million kilometers … or about 8 light-minutes.

Approximately 4.5 billion years old- consists of the Sun, planets, moons, meteors, asteroids, comets and dwarf planets.

The three-dimensional expanse in which all matter exists.

The only natural satellite of Earth that rotates around Earth every 27.3 days, and rotates around itself every 27.3 days as well.

A term that means everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it includes you.

A celestial body that meets 3 criteria: needs to orbit a star, be big enough that its own gravity shapes it as a sphere, be small enough that it isn’t a star itself, and have cleared its orbit of smaller objects.

Meteroids that enter Earth's atmosphere, forming bright streaks across the sky.

Object that orbits a larger object

A sphere, composed almost entirely of the elements hydrogen and helium that we revolve around.

Meteors before they reach Earth’s atmosphere.

Leftover meteors that don’t burn up completely, and manage to strike Earth. They provide important scientific information.

Panets orbiting stars other than our Sun. They are found in solar systems other than our own.

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Space Vocabulary

Part 1

Term	Definition
Asteroid	Metallic, rocky objects without atmospheres that orbit the Sun but are too small to be classified as planets or dwarf planets.
Galaxy	A group of billions of stars held together by gravity
Comet	Small objects primarily made of dust and ice that orbit the Sun.
Nebula	A giant cloud of dust and gas in space.
Dwarf planet	A celsdtial body that orbits a star, has enough mass to be a sphere, HAS NOT cleared its orbit of smaller objects, and is not be a moon.
Star	Giant collection of glowing gases at high temperatures.
Light year	A measure of the DISTANCE light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
Astronomical Unit (AU)	a measure of the average distance of Earth from the sun. That’s about 93 million miles, 150 million kilometers … or about 8 light-minutes.
Solar system	Approximately 4.5 billion years old- consists of the Sun, planets, moons, meteors, asteroids, comets and dwarf planets.
Space	The three-dimensional expanse in which all matter exists.
Moon	The only natural satellite of Earth that rotates around Earth every 27.3 days, and rotates around itself every 27.3 days as well.
Universe	A term that means everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it includes you.
Planet	A celestial body that meets 3 criteria: needs to orbit a star, be big enough that its own gravity shapes it as a sphere, be small enough that it isn’t a star itself, and have cleared its orbit of smaller objects.
Meteors	Meteroids that enter Earth's atmosphere, forming bright streaks across the sky.
Satellite:	Object that orbits a larger object
Sun	A sphere, composed almost entirely of the elements hydrogen and helium that we revolve around.
Meteoroids	Meteors before they reach Earth’s atmosphere.
Meteorites	Leftover meteors that don’t burn up completely, and manage to strike Earth. They provide important scientific information.
Exoplanets	Panets orbiting stars other than our Sun. They are found in solar systems other than our own.

Created by: 10227410231432973

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