<p>It is very unlikely. While the hypothetical planet <a href="http://en.wikipedia.org/wiki/Vulcan_%28hypothetical_planet%29" rel="noreferrer">Vulcan</a> between Mercury and the Sun was ruled out many decades ago searches for <a href="http://en.wikipedia.org/wiki/Vulcanoid_asteroid" rel="noreferrer">Vulcanoid asteroids</a> would very likely have detected anything that might qualify as a intra-Mercurial planet.</p>

CC BY-SA 3.0
2015-01-31T16:10:11.797Z
2015-01-31T16:10:11.797Z
Conrad Turner
<p>No, that is not possible. There are quite a few capable <a href="https://en.wikipedia.org/wiki/List_of_solar_telescopes" rel="nofollow">telescopes studying the Sun</a> since some decades. Already Galileo stared at the Sun until he got blind. Don't you think a planet would've been detected if it passed by in <a href="https://www.youtube.com/watch?v=8Sm8PBr3ysc#t=34" rel="nofollow">images like these</a>? But <a href="https://www.youtube.com/watch?v=M2JCKiSO7AA" rel="nofollow">Sun grazing comets</a> are pretty common visitors in the corona.</p>

<p>It is a bit weird that a couple of percent of exoplanetary systems have hot Jupiters. They probably didn't form there, but migrated. And still stay there somehow.</p>

CC BY-SA 4.0
2020-02-07T10:30:01.903Z
Galileo reportedly didn't go blind due to his observations of the Sun. His blindness is said to have had another cause.
user30007
CC BY-SA 3.0
2015-01-31T17:32:43.840Z
2015-01-31T17:32:43.840Z
LocalFluff
<p>Could there be another planet between Mercury and the Sun?
Kepler found a lot of planets orbiting its star even 20 times closer than Mercury.
If there were such planets in our system - would it be possible to discover them?</p>

<solar-system><planet>
Could there be another planet between Mercury and the Sun?
jlp
# Could there be another planet between Mercury and the Sun?

(Asked by: username_0 on 2015-01-31)

Could there be another planet between Mercury and the Sun?
Kepler found a lot of planets orbiting its star even 20 times closer than Mercury.
If there were such planets in our system - would it be possible to discover them?

**Tags:** solar-system, planet

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## 2 answers

### Answer by username_1 on 2015-01-31. Score: 6

It is very unlikely. While the hypothetical planet [Vulcan](http://en.wikipedia.org/wiki/Vulcan_%28hypothetical_planet%29) between Mercury and the Sun was ruled out many decades ago searches for [Vulcanoid asteroids](http://en.wikipedia.org/wiki/Vulcanoid_asteroid) would very likely have detected anything that might qualify as a intra-Mercurial planet.


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### Answer by username_2 on 2015-01-31. Score: 3

No, that is not possible. There are quite a few capable [telescopes studying the Sun](https://en.wikipedia.org/wiki/List_of_solar_telescopes) since some decades. Already Galileo stared at the Sun until he got blind. Don't you think a planet would've been detected if it passed by in [images like these](https://www.youtube.com/watch?v=8Sm8PBr3ysc#t=34)? But [Sun grazing comets](https://www.youtube.com/watch?v=M2JCKiSO7AA) are pretty common visitors in the corona.

It is a bit weird that a couple of percent of exoplanetary systems have hot Jupiters. They probably didn't form there, but migrated. And still stay there somehow.

> **Comments:**
> **username_3**: Galileo reportedly didn't go blind due to his observations of the Sun. His blindness is said to have had another cause.  

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