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Posted (edited)

Neutron star

 

A star massive enough that when it runs out of fuel to sustain radiation pressure, its gravitational collapse overcomes electron degeneracy pressure ( but not neutron degeneracy pressure ).

Edited by MigL
Posted

Rigel

 

Blue-white super giant star in Orion.

Seventh brightest star in the sky and about 120000 times brighter than the Sun.

Posted

Yildun - A greenish star in the middle of the tail of the Little Bear (Also known as Ursa Minor, with Polaris being at the end of the tail), known as one of the "dancers" that circles around Polaris.

Posted

Nadir - the point on the celestial sphere directly beneath a given position or observer and diametrically opposite the zenith

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Römer- A Danish astronomer who made one of the earliest measurements for the speed of light. also the name of a Lunar impact crater.

Posted (edited)

Rosalind- An inner satellite of Uranus, discovered by Voyager 2 on January 13,1986

Edited by ACG52
Posted

Deneb

 

Blue-white supergiant star.

Approx 200 times the diameter of the Sun, and 200000 times brighter.

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Earth- A medium-sized rocky planet with an oxygen rich atmosphere occupying the third position around a yellow dwarf star named Sol.

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Helios

 

In Greek mythology, the personification of the Sun.

Also the names of two probes launched into heliocentric orbits to study solar processes.

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Seyfert Galaxy-a main-sequence star which rotates rapidly, causing a loss of matter to an ever-expanding shell.

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Year - Time period based on Earth's rotation [around the Sun].

Edited by Acme
Posted (edited)

Retrograde -the orbital motion of an object in a clockwise direction when viewed from the north pole of the ecliptic.

Edited by ACG52

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