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Of or pertaining to the study of celestial objects. This includes the physics, chemistry, and evolution of moons, planets, stars, galaxies, and any phenomena that takes place outside the atmosphere of Earth.

Contributors in Astronomy


black hole

Physics; Astronomy

An orbit in outer space that is so dense that its gravity will not let anything escape from it.


Physics; Astronomy

Danish scientist who made accurate studies of the planets and stars before the telescope became commonly used.


Physics; Astronomy

The scientific study of what happened inside stars and galaxies and how objects in space move in relation to each other.

Foucault pendulum

Physics; Astronomy

A pendulum that was made by Jean Foucault in 1851 to show that the Earth is rotating.

escape velocity

Physics; Astronomy

The speed at which an object, such as a rocket, must travel in order to escape from a planet's pull of gravity.


Physics; Astronomy

A vehicle that has one or more engines that burn fuel without taking oxygen from the air.


Physics; Astronomy

Tiangong-1 is China's first space laboratory, due to launch on September 29th 2012. It will launch unmanned and orbit the earth for a few weeks until Shenzhou 8 launches, when the 2 constructs will ...

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