Do they have an atmosphere or are they made out of rock
2007-03-17 19:44:27 · 7 answers · asked by sammy 1 in Science & Mathematics ➔ Astronomy & Space
They are both mostly solid objects that orbit around the sun.
2007-03-17 21:02:34 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Mercury does not have much of an atmosphere unlike the Earth.
Like the Earth, Mercury has a core of Iron and Nickel which in both cases has given rise to a magnetic field. Mercury does have a larger core relative to its size than Earth. Why this is so is unknown, one possibility is that soon after the planets formed, a collision shattered Mercury so that it lost much of the material that overlayed the core.
Both planets are unlike the giant planets like Jupiter and Saturn which are mostly composed of Hydrogen and Helium. gas.
2007-03-18 20:07:51 · answer #2 · answered by 12dozen 2 · 0⤊ 0⤋
Earth does have an atmosphere and they are both made of rock.
Oh, they are both in the same solar system.
2007-03-17 19:48:25 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Well, the most obvious similarity is that they are round in shape, they are made out of rock and they revolve around the Sun anti-clockwise. (unlike Venus)
2007-03-18 01:06:59 · answer #4 · answered by adrian_08 2 · 0⤊ 0⤋
They are both children of the sun. Both spherical both containing rock and other minerals. The basic ingredients are the same but have been "cooked" differently and with different proportions.
2007-03-17 20:42:12 · answer #5 · answered by The Stainless Steel Rat 5 · 0⤊ 0⤋
Both planets, made out of rock (silicate rock)
2007-03-17 19:49:07 · answer #6 · answered by asgspifs 7 · 0⤊ 0⤋
they are both round
2007-03-17 19:57:44 · answer #7 · answered by isabella 1 · 0⤊ 0⤋