4 ms·

in theory, that sounds a lot more like Earth than any other known celestial body. now, whether or not it's all accurate, we'll find out eventually.

luchak 17y ago
I'm not so sure, given the article as written. Comparing Earth and Jupiter: 1. made up of about three-quarters liquid water False for both. Possibly true for Earth if you're talking about surface area, but that's a pretty generous interpretation of the article as written. 2. with a solid core of iron and nickel Likely true for both. ("At the center of [Jupiter's] rocky core is probably a metallic ball of iron and nickel, just like Earth's core." http://www.spacedaily.com/reports/Jupiter_Has_Large_Rocky_Core_Surrounded_By_Layer_Of_Ice_999.html http://www.spacedaily.com/reports/Jupiter_Has_Large_Rocky_Co...) 3. an atmosphere of hydrogen and helium True for Jupiter, not for Earth. That's 2 of 3 for Jupiter, 1 of 3 for Earth (or 2 of 3 for Earth if you're being generous). Mars sounds a lot more like Earth than GJ 1214b does, based on the article. GJ 1214b might be more like Earth than any other known exoplanet, but given the murky reporting it's hard to tell.
- hugh_ 17y ago
  GJ 1214b might be more like Earth than any other known exoplanet, but given the murky reporting it's hard to tell. I'd say the most Earthlike exoplanet discovered so far is CoRoT-7b, discovered a few months ago. It's about five times more massive than Earth, but has a similar density, implying it should consist mostly of rock. http://spacefellowship.com/2009/09/16/smallest-exoplanet-is-shown-to-be-a-solid-rocky-world/ http://spacefellowship.com/2009/09/16/smallest-exoplanet-is-...
hugh_ 17y ago
Actually it'd be more like a small Neptune/Uranus than a large Earth. Those two planets are made up mostly of a water/ammonia/methane mixture with a solid core and a H/He outer atmosphere. http://en.wikipedia.org/wiki/Neptune#Composition_and_structure http://en.wikipedia.org/wiki/Neptune#Composition_and_structu...
eru 17y ago
Mars and Venus are more similar to Earth than this.

luchak 17y ago

I'm not so sure, given the article as written. Comparing Earth and Jupiter: 1. made up of about three-quarters liquid water False for both. Possibly true for Earth if you're talking about surface area, but that's a pretty generous interpretation of the article as written. 2. with a solid core of iron and nickel Likely true for both. ("At the center of [Jupiter's] rocky core is probably a metallic ball of iron and nickel, just like Earth's core." http://www.spacedaily.com/reports/Jupiter_Has_Large_Rocky_Core_Surrounded_By_Layer_Of_Ice_999.html http://www.spacedaily.com/reports/Jupiter_Has_Large_Rocky_Co...) 3. an atmosphere of hydrogen and helium True for Jupiter, not for Earth. That's 2 of 3 for Jupiter, 1 of 3 for Earth (or 2 of 3 for Earth if you're being generous). Mars sounds a lot more like Earth than GJ 1214b does, based on the article. GJ 1214b might be more like Earth than any other known exoplanet, but given the murky reporting it's hard to tell.

hugh_ 17y ago
GJ 1214b might be more like Earth than any other known exoplanet, but given the murky reporting it's hard to tell. I'd say the most Earthlike exoplanet discovered so far is CoRoT-7b, discovered a few months ago. It's about five times more massive than Earth, but has a similar density, implying it should consist mostly of rock. http://spacefellowship.com/2009/09/16/smallest-exoplanet-is-shown-to-be-a-solid-rocky-world/ http://spacefellowship.com/2009/09/16/smallest-exoplanet-is-...

hugh_ 17y ago

Actually it'd be more like a small Neptune/Uranus than a large Earth. Those two planets are made up mostly of a water/ammonia/methane mixture with a solid core and a H/He outer atmosphere. http://en.wikipedia.org/wiki/Neptune#Composition_and_structure http://en.wikipedia.org/wiki/Neptune#Composition_and_structu...

eru 17y ago

Mars and Venus are more similar to Earth than this.