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You entered: planetary system
![Земля и Луна: планетная система](https://images.astronet.ru/pubd/2001/10/23/0001171886/EarthMoon_mariner10.preview.jpg)
15.10.2001
How similar in size are the Earth and the Moon? A dramatic visual answer to this question is found by combining photographs taken by the Mariner 10 spacecraft that headed out toward Venus and Mercury in 1973.
![Планетные системы, образующиеся в туманности Ориона](https://images.astronet.ru/pubd/2003/04/24/0001189628/orionsys_hst_big.preview.jpg)
7.12.1996
How do planets form? Astronomers are finding out by studying one of the most interesting of all astronomical nebulae known, the Great Nebula in Orion. Insets to above mosaic show several planetary systems in formation. The bottom left insert shows the relative size of our own Solar System. The Orion Nebula contains many stellar nurseries.
![HD 10180: самая богатая экзопланетная система.](https://images.astronet.ru/pubd/2010/08/26/0001246767/hd10180.preview.jpg)
25.08.2010
Do other rich planetary systems exist? Our Solar System has the most planets of any known star, most probably because it is so hard to detect planets around other stars. Sensitive measurements, though, have...
![Лаланд 21185 - ближайшая планетная система?](https://images.astronet.ru/pubd/2003/04/23/0001189397/lalandeb_whatm_big.preview.jpg)
19.10.1996
What's the closest extrasolar planetary system? It may well be planets of the dim red dwarf star cataloged as Lalande 21185 -- a mere 8 light years distant. This star is too faint to be seen by the naked eye and its planets have not been imaged directly.
![Планетная система Кеплер-90](https://images.astronet.ru/pubd/2017/12/18/0001394384/Kepler90Illustration_Kepler_1080.preview.jpg)
18.12.2017
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.
![Планетные системы формируются в Орионе](https://images.astronet.ru/pubd/2009/12/22/0001237501/orionproplyds_hst.preview.jpg)
22.12.2009
How do planets form? To help find out, the Hubble Space Telescope was tasked to take a detailed look at one of the more interesting of all astronomical nebulae, the Great Nebula in Orion.
![Планетная система Кеплер-90](https://images.astronet.ru/pubd/2020/04/28/0001647650/Kepler90Illustration_Kepler_1080.preview.jpg)
28.04.2020
Do other stars have planetary systems like our own? Yes -- one such system is Kepler-90. Cataloged by the Kepler satellite that operated from Earth orbit between 2009 and 2018, eight planets were discovered, giving Kepler-90 the same number of known planets as our Solar System.
![Человечество исследует Солнечную систему](https://images.astronet.ru/pubd/2013/04/30/0001286504/ssmissions_frohn_960.preview.jpg)
30.04.2013
What spacecraft is humanity currently using to explore our Solar System? Presently, every inner planet has at least one robotic explorer, while several others are monitoring our Sun, some are mapping Earth's Moon, a few are chasing asteroids and comets, one is orbiting Saturn, and several are even heading out into deep space.
![Открытие планетной системы у звезды HR 8799](https://images.astronet.ru/pubd/2008/11/17/0001231875/hr8799_keck_big.preview.jpg)
17.11.2008
How common are planetary systems like our own Solar System? In the twelve years previous to 2008, over 300 candidate planetary systems have been found orbiting nearby stars. None, however, were directly imaged, few showed evidence for multiple planets, and many had a Jupiter-sized planet orbiting inside the orbit of Mercury.
![HD70642: звезда с планетами земного типа?](https://images.astronet.ru/pubd/2003/07/09/0001191505/hd70642_pparc.preview.jpg)
9.07.2003
Astronomers have discovered a planetary system more similar to our own Solar System than any known previously. The bright star HD70642, visible with binoculars toward the constellation of Puppis, was already known to be a star like our Sun.
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