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The Hubble observations
similar to blackish carbonaceous chondrite asteroids
The 2002 Blue Marble featured land surfaces
The larger
The total aggregate exposure time was about 2000 seconds and the field of view is about 3
HD 40307g - Super Earth Size:36" x 24" (91 cm x 61 cm) The Hubble observationsTwice as big in volume as the Earth, HD 40307g straddles the line between "Super Earth" and "mini Neptune" and scientists aren't sure if it has a rocky surface or one that's buried beneath thick layers of gas and ice. One thing is certain though: at eight times the Earth's mass, its gravitational pull is much, much stronger. Image Credit: JPL NASA
