Gliese 1214 b
Gliese 1214 b (often shortened to GJ 1214 b) is an exoplanet that orbits the star Gliese 1214, and was discovered in December 2009. Its parent star is 48 light-years from the Sun, in the constellation Ophiuchus. As of 2017, GJ 1214 b is the most likely known candidate for being an ocean planet. For that reason, scientists have nicknamed the planet "the waterworld".

It is a super-Earth, meaning it is larger than Earth but is significantly smaller (in mass and radius) than the gas giants of the Solar System. After COROT-7b, it was the second super-Earth to be known and is the first of a new class of planets with small size and relatively low density. GJ 1214 b is also significant because its parent star is relatively near the Sun and because it transits (crosses in front of) that parent star, which allows the planet's atmosphere to be studied using spectroscopic methods.

In December 2013, NASA reported that clouds may have been detected in the atmosphere of GJ 1214 b.
Q44559
exoplanet
Concept
Q1068712
Gliese 1214
CEL
Q531
light-years
Concept
Q525
Sun
CEL
Q8906
Ophiuchus
CEL
Q1045138
ocean planet
Concept
Q327757
super-Earth
CEL
Q2
Earth
CEL
Q121750
gas giant
Concept
Q544
Solar System
Concept
Q630272
COROT-7b
CEL
Q525
Sun
CEL
Q6888
transits
Concept
Q483666
spectroscopic methods
Concept
Q8074
clouds
Concept
None
atmosphere
UNK
Q512396
Gliese 1214 b
Concept
1214-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1214
DATE
1214-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1214
DATE
1214-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1214
DATE
2009-12-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
December 2009
DATE
2017-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2017
DATE
1214-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1214
DATE
1214-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1214
DATE
2013-12-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
December 2013
DATE
1214-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1214
DATE
+48^^http://www.w3.org/2001/XMLSchema#decimal
48
NUMBER
-7^^http://www.w3.org/2001/XMLSchema#decimal
-7
NUMBER
parent astronomical body
constellation
instance of