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So far only one extrasolar planet has officially been confirmed as rocky, but many dozens are assumed to be rocky. This is because a planet must have both its size AND its mass measured to confirm it as rocky or gaseous, but almost all extrasolar planets have only had their masses measured due to the technical difficulties of measuring a distant planet's size. Most planets significantly less massive than Neptune are assumed to be rocky.

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Q: How many rocky extra solar planets are discovered?
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Related questions

How many planets in our solar system?

Eight


How many rocky planets are in our solar system?

There are 5 rocky planets in our solar system if you count Pluto. If not, there are 4 rocky planets in the solar system.


Extra solar planets are planets that?

Extra solar planets are planets that is outside of our solar system.


Are there planets in spiral galaxy?

yes, for example us and the rest of the planets in the solar system. to date there are also approx 400 extra solar planets discovered (planets beyond our solar system)


How many rocky planets are there in the solar?

4 rocky planets


What are planets in the inner solar system called?

the rocky planets


Which planets are rocky in your solar system?

most of inner planets


What planets are attributed as the rocky planets in the solar system?

Pluto


What was surprising about the extrasolar planets that were discovered?

The surprising thing to me is how MANY extra-solar planets have been discovered. Considering the limitations of the Kepler Space Telescope's design, this indicates that there may be planets around a majority of the stars.


Which planet in the solar system are rocky?

The planets in our Solar System that are rocky are Mercury, Venus, Earth, and Mars. These inner planets are also called "Terrestrial Planets."


What are the 5 rocky planets?

The first four planets from sun Mercury, Venus, Earth and Mars are rocky planets other planets in solar system are gaseous or dusty planets.


How many planets are rocky planets?

In our solar system, there are officially 4 rocky planets: Mercury Venus Earth Mars The small dwarf planet called Pluto is also rocky.