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General astronomy

Contributors in General astronomy

General astronomy

penumbra

Astronomy; General astronomy

A partial shadow. The lighter, outer part of the shadow that is cast by the Moon onto the Earth during the solar eclipse.

pulsar

Astronomy; General astronomy

A spinning star that gives off beams of radiation that sweep around like the beam of light sent out by a lighthouse.

Ptolemaic system

Astronomy; General astronomy

Ptolemaic system has the Earth as its center, and the Sun, stars, and planets revolve around the Earth in circular orbits.

probe

Astronomy; General astronomy

A vehicle that is sent into outer space to collect information about objects in the universe. Space probes give information in the form of pictures and temperature readings.

rotation

Astronomy; General astronomy

The act of spinning on an axis is called spinning. The Earth makes one complete rotation every 24 hours.

red giant

Astronomy; General astronomy

A very large, bright star that looks red because its surface is not as hot as the surface of most other stars.

revolution

Astronomy; General astronomy

The act of revolving around a central point or object. The Earth makes one complete revolution around the Sun in about 365 days.

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