Stars
Space Rocks
Space
100

What is a star?

A star is an astronomical object comprising a luminous spheroid of plasma held together by self-gravity.

100

What is a moon?

A moon is a natural satellite that revolves around a planet.  

100

What is the solar system?

The Solar System is the gravitationally bound system of the Sun and the objects that orbit the star.

200

What is a red giant?

A red giant is a luminous giant star of low or intermediate mass in a late phase of stellar evolution

200

What is a meteor?

When meteoroids enter Earth's atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors.

200

What is revolving?

"Revolution" refers to the object's orbital motion around another thing.

300

What is a constellation?

A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.

300

What is a comet?

Comets are cosmic snowballs of frozen gases, rock, and dust that orbit the Sun.

300

What is a light year?

A light year is the time it takes for light to travel for one year. (moving at the speed of light).

400

What is a neutron star?

A neutron star is the collapsed core of a massive supergiant star.

400

What is a meteorite 

A meteorite is a meteor that has reached the ground and has did not burn up in the atmosphere. 

400

What is an asterism?

An asterism is an observed pattern or group of stars in the sky.