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'''Kepler-37''' is a yellow dwarf, ], 215.2 ] away in the ] ]. It is host to the ] Kepler-37b, Kepler-37c and Kepler-37d. They all orbit very close to the star. Kepler-37 has a mass of about 80.3 percent of the ] and a radius of about 77 percent. It has a temperature similar to that of our Sun, just a bit cooler at 5,417 Kelvin. It has only about half the metallicity of our Sun. With an age of roughly 6 billion years it is slightly older but it is still a main-sequence star. '''Kepler-37''' is a yellow dwarf, ], 215.2 ] from Earth in the ] ]. It is host to ] Kepler-37b, Kepler-37c and Kepler-37d, which all orbit very close to the star. Kepler-37 has a mass about 80.3 percent of the ] and a radius about 77 percent as large. It has a temperature similar to that of the Sun, but a bit cooler at 5,417 ]. It has about half the ] of our Sun. With an age of roughly 6 billion years, it is slightly older than the Sun, but is still a main-sequence star.


== Planetary system == == Planetary system ==
Kepler-37b is the closest planet to the Kelper-37. At the time of its discovery in February 2013, it was the smallest known exoplanet.<ref name=sciencenews>{{cite news|title=Tiniest Planet Yet Discovered by NASA Outside our Solar System|author=Catherine Griffin|work=Science News|date=February 21, 2013|url=http://www.scienceworldreport.com/articles/5098/20130221/tiniest-planet-discovered-nasa-outside-solar-system.htm|accessdate=February 21, 2013}}</ref> At 3865 kilometers in diameter, it is slightly larger than ] ]. It orbits Kepler-37 once every 13 Earth days at a distance of about 0.1 ]. It is too small and too close to its star to maintain an atmosphere.


Kepler-37b is closest to the star. It is the smallest known exoplanet as of February 2013. At 3865 kilometers in diameter it is slightly larger than ] ]. It orbits Kepler-37 once every 13 Earth days at a distance close to 0.1 AU and is too small and too close to its star to maintain an atmosphere. Kepler-37c is around three-quarters of the diameter of Earth and orbits approximately every 21 Earth days at a distance of just under 0.14 AU.


Kepler-37c has around three-quarters the diameter of Earth and it orbits about every 21 Earth days at a distance of nearly 0.14 AU. Kepler-37d is about twice the diameter of Earth. It orbits in around 40 Earth days at a distance of nearly 0.21 AU.

Kepler-37d has about twice the diameter of Earth. It has an orbital period of around 40 Earth days at a distance of nearly 0.21 AU.


==References== ==References==
{{reflist}} {{reflist}}
* Nature, & supplementary information, * ''Nature'', & supplementary information,
* Bad Astronomy, * "Bad Astronomy",
* NASA, * NASA,
* *


==See also== ==External links==
* NASA, Kepler mission, * NASA, Kepler mission,


Revision as of 14:29, 21 February 2013

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Kepler-37
Diagram showing star positions and boundaries of the constellation and its surroundingsLocation of Kepler-37 in (circled)

Kepler-37 is a yellow dwarf, G-type star, 215.2 light years from Earth in the constellation Lyra. It is host to exoplanets Kepler-37b, Kepler-37c and Kepler-37d, which all orbit very close to the star. Kepler-37 has a mass about 80.3 percent of the Sun's and a radius about 77 percent as large. It has a temperature similar to that of the Sun, but a bit cooler at 5,417 Kelvin. It has about half the metallicity of our Sun. With an age of roughly 6 billion years, it is slightly older than the Sun, but is still a main-sequence star.

Planetary system

Kepler-37b is the closest planet to the Kelper-37. At the time of its discovery in February 2013, it was the smallest known exoplanet. At 3865 kilometers in diameter, it is slightly larger than Earth's moon. It orbits Kepler-37 once every 13 Earth days at a distance of about 0.1 AU. It is too small and too close to its star to maintain an atmosphere.

Kepler-37c is around three-quarters of the diameter of Earth and orbits approximately every 21 Earth days at a distance of just under 0.14 AU.

Kepler-37d is about twice the diameter of Earth. It orbits in around 40 Earth days at a distance of nearly 0.21 AU.

References

  1. Catherine Griffin (February 21, 2013). "Tiniest Planet Yet Discovered by NASA Outside our Solar System". Science News. Retrieved February 21, 2013.
  • Nature, & supplementary information,
  • "Bad Astronomy",
  • NASA,
  • JPL

External links


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