Kelvin - temperature scale based on absolute zero.

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 July 19, 201510 yr by MigL

Romulus - Star Trek's inhabited second planet of the Romulan system in Sector Z-6.

Scintillation - The atmospheric effects influencing astronomical observations.

 

Neutrino - A fundamental particle produced by the nuclear reactions in stars

Olber's paradox

 

Why isn't the night sky bright ?

X-ray star - A star whose primary output is in the form of x-rays

Rigel

 

Blue-white super giant star in Orion.

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

Luminosity - the measure of the light output of a star

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.

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

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

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

Edited July 19, 201510 yr by ACG52

Deneb

 

Blue-white supergiant star.

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

Barycenter- center of mass of a system of bodies.

Radiant - the point in the sky that meteor showers appear to come from.

Taurids - a meteor shower so named as their Radiant is in the Constellation Taurus

Sterope - The name shared by two stars in the constellation Taurus.

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

Helios

 

In Greek mythology, the personification of the Sun.

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

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

Yerkes System - A spectral classification system for stars

Mercury -closest planet to the sun.

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

Edited July 20, 201510 yr by Acme

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

Edited July 20, 201510 yr by ACG52