Reflector telescope

 

Using a curved mirror(s) to form the image, as opposed to refracting telescopes, which use lens.

Suffers less from chromatic aberration and allows for much larger objectives.

Ejecta - material thrown out of an impact crater.

Amalthea - one of Jupiter's moons.

Albedo - Ratio of solar radiation reflected from a space body to the radiation received by the body.

Edited July 26, 201510 yr by Acme

Orion - winter constellation in the northern hemisphere

Neutronium

 

Composed entirely of degenerate neutrons.

Believed to exist only in gravitationally collapsed neutron stars.

Norma arm - a minor spiral arm of our galaxy.

Molecular Cloud- An interstellar cloud of molecular hydrogen containing trace amounts of other molecules such as carbon monoxide and ammonia.

Deuterium

 

Chemically similar to Hydrogen but containing two nucleons.

No other source other than Big Bang nucleosynthesis.

Meteoroid- A small, rocky object in orbit around the Sun, smaller than an asteroid.

Deneb - Brightest star in the constellation Cygnus (The same constellation that Kepler 542 b is in.)

Betelgeuse, Betelgeuse, Betelgeuse - Red supergiant star in the constellation Orion; 520 light-years from our solar system and over 600 million miles in diameter.

Elliptical Galaxy- A galaxy whose structure shaped like an ellipse and is smooth and lacks complex structures such as spiral arms.

Yohkoh - a Japanese satellite for studying Solar activity

Heliosphere - the immense magnetic bubble containing our solar system, solar wind, and the entire solar magnetic field. It extends well beyond the orbit of Pluto.

Expansion

 

The process whereby separation of non-gravitationally bound structures and objects within the observable universe is increasing.

Whether driven by the cosmological constant or "dark' energy, the process is currently ( several billion years ) accelerating.

NASDA - The National Air and Space Development Agency in Japan

Achondrite - a class of stoney meteorite.

Extragalactic- outside of or beyond our own galaxy.

Canis Major - the constellation which contains Sirius, the brightest star in the sky.

Radio Galaxy- A galaxy that gives off large amounts of energy in the form of radio waves.

Yardang - A type of long hill that is pointed on both ends & lies parallel to the winds that create it. Seen to date on Earth & Mars.

Granulation- A pattern of small cells that can be seen on the surface of the Sun. They are caused by the convective motions of the hot gases inside the Sun.

Node - One of two points where an inclined orbit crosses the plane of the ecliptic.

El Nath - Traditional name of Beta Tauri, second brightest star in the constellation Taurus.

Edited July 27, 201510 yr by Mad For Science