Astronomy word game.

[Mordred]

Achilles A Trojan asteroid orbiting at the L4 point in Jupiters orbit (60◦ ahead of Jupiter).

[ACG52]

Sylvia - an class x asteroid with a mean diameter of 286 km, a semimajor axis of 3.48 au,discovered br R.N.Pogson on May 16,1866.

[Mordred]

Adrastea Moon of Jupiter, also designated JXV.

[Janus]

Aristoteles - a crater on the Moon named after Aristotle

[Acme]

Selenocentric - Of or about the center of the Moon.

[ACG52]

Canis Major -is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy's 48 constellations, and is counted among the 88 modern constellations.

[MigL]

Radiation era

 

Initial phase of the universe when dynamics were governed by radiation.

Spanned the time 10 sec to 10^12 sec after the Big bang and preceeded the matter era and dark-energy era ( current ).

[ACG52]

Antares- a red supergiant star with a radius 883 times that of the sun

[Acme]

Shepherd moon - A small moon orbiting within a planetary ring system whose gravity maintains a distinct edge to rings. Cordelia and Ophelia are shepherd moons in Uranus' ring system.

[MigL]

No -Hair Theorem

 

A theorem by J.A. Wheeler stating that upon gravitational collapse, the only properties conserved by a Black hole are mass, momentum and charge.

[ACG52]

Miranda - smallest of Uranus' moons

[MigL]

Apollo

 

US space program which resulted in the first manned Moon Landing.

Deity of Greek mythology.

[Mordred]

Oberon Moon of Uranus, also designated

UIV.

[ACG52]

Nuclear Fusion- The nuclear process whereby several small nuclei are combined to make a larger one whose mass is slightly smaller than the sum of the small ones. Nuclear fusion is the reaction that fuels the Sun, where hydrogen nuclei are fused to form helium.

[Mordred]

Neupert effect-Statement that the temporal derivative of the observed soft X-ray emission during a solar flare reproduces the observed time

development of the hard X-ray emission.

[MigL]

Non-Euclidian geometry

 

A geometry where the interior angles of a triangle do not add up to 180 degrees.

Popularised by Gauss, Boylai, and eventually, Riemann, and used by Einstein as a model for space-time geometry in GR.

 

Edit- Sorry took too long. Disregard.

Tidal force

 

Differential gravitational force exerted on an object of size by a gravitating mass.

Edited August 7, 2015 by MigL

[ACG52]

Thisbe- A b class asteroid,232 km in diameter, 2.76 au from the sun, discovered by C.Peters on June 15,1866.

 

I missed migl's post.

 

Eunumia- A class S asteroid 268 km in diameter, 2.64 au from the sun, discovered in 1855

Edited August 7, 2015 by ACG52

[Acme]

Earthlight - Light reflected onto the dark side of the Moon from Earth's atmosphere.

[Mordred]

Europa Moon ofJupiter, also designated JII. Discovered by Galileo in 1610, it is one of the four Galilean satellites.

Lorentz boost Lorentz transformation of space-time coordinates from one system of reference to another moving at a constant velocity with respect to each other.

 

( my turn to be too late)

[Acme]

Ablation - Erosion of an object due to heating as it passes through an atmosphere.

[Mordred]

Naiad Moon of Neptune also designated

NVIII. Discovered by Voyager 2 in 1989,

Edited August 7, 2015 by Mordred

[ACG52]

Namaka- smallest moon of the outer dwarf planet Haumea. Discovered in 2005 by the Keck observatory.

Edited August 7, 2015 by ACG52