Астронет: Астрономическая картинка дня Планетная система Кеплер-90 http://www.variable-stars.ru/db/msg/1394368/eng |
Credit & Copyright: NASA Ames, Wendy Stenzel
Explanation:
Do other stars have planetary systems like our own?
Yes -- one such system is
Kepler-90.
Cataloged by the orbiting
Kepler satellite, an
eighth planet has now been discovered giving Kepler-90 the same number of known
planets as our Solar System.
Similarities between Kepler-90 and our system include a
G-type star comparable to our Sun, rocky planets comparable to our Earth, and
large planets comparable in size to
Jupiter and
Saturn.
Differences include that all of the known
Kepler-90
planets orbit relatively close in -- closer than Earth's orbit around the Sun --
making them possibly too hot to harbor life.
However, observations over longer time periods may discover
cooler planets further out.
Kepler-90 lies about 2,500
light years away, and at magnitude 14 is visible with a medium-sized telescope toward
the constellation of the Dragon
(Draco).
Exoplanet-finding missions
planned for launch in the next decade include
TESS,
JWST,
WFIRST, and
PLATO.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.