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Exoplanets Glossary

A

astronomer
a scientist who studies planets, comets and other space bodies
atmosphere
the air or gases that surround a planet

B

bacteria
a one celled living organism

C

carbon dioxide
a gas given off by animals and taken in by plant
compressed
to squeeze together
corot
a space mission by France to detect changes in the light of stars

D

decompressed
to spread out
demoted
to categorize something on a lower level
detected
to find or see
determine
to find or see or understand
Doppler effect
named after the Austrian physicist and mathematician, Christian Johann Doppler who in 1842 explained the effect of sound waves as they move past a person
dwarf planet
a space body too small to be called a planet

E

exoplanets
planets that exist orbiting stars other than our own sun
extrasolar planets
planets that exist orbiting stars other than our own sun

G

galaxy
a large system of stars
gravitational
related to gravity

I

inaccurate
not quite true

L

light-year
the distance light travels in one Earth year or

M

maintain
to keep or continue
MOST
Microvariability and Oscillations of Stars mission to study the transit of planets across their star - Canadian

O

orbiting
the curved path of a planet around its sun
ozone
a poisonous gas

R

radial velocity
the speed of an object as it moves toward or away from an observer

S

satellite
a body that orbits another body

T

transit
the passage of a planet across its sun

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