General astronomy

General astronomy

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General astronomy

Comet Hartley 2

Astronomy; General astronomy

Comet Hartley 2 was discovered in 1986 by Malcolm Hartley, an Australian astronomer. Comet Hartly 2's circuit around the sun takes about 6.46 years Also known as Comet 103P, the comet was close ...

bulge of the earth

Astronomy; General astronomy

The extra length of the earth diameter at its equator due to the centrifugal force of the earth's spinning motion. As a result, the earth is a slightly flattened sphere. The earth's bulge causes ...

earthshine

Astronomy; General astronomy

The faint glow which dimly illuminates the dark part of the new moon which is seen as a narrow crescent. During this time, the earth is completely illuminated by the Sun which is the source of ...

A remnant star of a supernova explosion with an approximate size of the sun or larger , in which gravity has caused all matter to collapse into a giant nucleus composed only of neutrons. The collapse ...

stellar evolution

Astronomy; Galaxy

The complete developmental stages in the lifetime of a star from its formation out of gas and dust to the time when its nuclear fuel is exhausted. Based on this stellar evolution model, the Sun is at ...

Big Dipper

Astronomy; General astronomy

A prominent constellation in the northern sky that consists of 7 bright stars forming the pattern of a dipper. Also known as the Plough or the Saptarishi, it rarely sets below the horizon and is ...