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SpaceEngineer
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Exoplanets news thread

14 Mar 2017 07:20

TRAPPIST-1 discussion and addon for 0.98 is here.
 
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Exoplanets news thread

19 Jun 2017 09:43

"Exploration is in our nature. We began as wanderers, and we are wanderers still"
-carl sagan
 
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Wicker1M
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Exoplanets news thread

15 Dec 2017 07:31

An eighth planet has been discovered at the star Kepler-90. This makes the Kepler-90 star similar to our sun with the number of planets in the Kepler-90 system equal to the number of planets in our solar system. 
https://arxiv.org/abs/1712.05044

Of course, if you consider dwarf planets like Pluto to be actual planets, then our solar system has the most planets.
 
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Mr. Missed Her
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Exoplanets news thread

17 Dec 2017 07:26

Wicker1M wrote:
Source of the post Of course, if you consider dwarf planets like Pluto to be actual planets, then our solar system has the most planets.

(Known.)
Space is very spacious.
 
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Watsisname
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Exoplanets news thread

20 Dec 2017 01:24

Yeah, since we cannot yet detect exoplanets smaller than the Moon, it makes little sense to compare the number of known planets + dwarf planets in the solar system to any other system.  If we could, our system's status of "having the most" would probably be lost very quickly.
 
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Exoplanets news thread

20 Dec 2017 06:55

We also can't detect planets which are very far from the star, like Uranus and Neptune. So systems like Kepler-90 may actually have more planets.
Compact systems with many planets packed inside Mercury orbit probably have no external planets (or have just few of them). We can roughly estimate "is the system map complete" by summing up the masses of all known planets and dividing them on mass of the host star. If it is greater than 0.002, this may indicate that star has no unknown gas giants at the least (but still may have smaller planets of course). This is the upper limit on the mass of the protoplanetary disk.

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