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Mars vs. Mercury , which is better?

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.

Mercury is the smallest and innermost planet in the Solar System. Its orbital period around the Sun of 87.97 days is the shortest of all the planets in the Solar System. It is named after the Roman deity Mercury, the messenger of the gods.

Difference and similar

Absolute magnitude

Mars

-1.52

Mercury

-0.6

Visual brightness

Mars

-26.7

Mercury

Mean distance from Earth

Mars

225 million km

Mercury

77 million km)

Spectral classification

Mars

Mercury

398.4 nm

Metallicity

Mars

Mercury

0.3 AU

Angular size

Mars

15 arcminutes

Mercury

Adjectives

Mars

Martian

Mercury

Mercurian

Galactic period

Mars

686.971 d

Mercury

Velocity

Mars

24.1 km/s

Mercury

0.387 AU = 5.79x107 km

Equatorial radius

Mars

3396.2 ± 0.1 km

Mercury

2,440 km

Equatorial circumference

Mars

21,344 km

Mercury

15,329 km

Flattening

Mars

0.00589±0.00015

Mercury

< 0.0006

Surface area

Mars

144798500 km2

Mercury

74.8 million km²

Volume

Mars

1.6318×1011 km3

Mercury

6.083 x 1010 cubic kilometers

Mass

Mars

6.4171×1023 kg

Mercury

3.285 × 10^23 kg

Average density

Mars

3.93 g/cm³

Mercury

5.43 g/cm³

Center density

Mars

Mercury

5.4 g/cm3

Equatorial surface gravity

Mars

6.42 x 1023 kilograms

Mercury

10.892 km/h

Moment of inertia factor

Mars

0.3662±0.0017

Mercury

Escape velocity

Mars

5.027 km/s

Mercury

4.25 km/s

Temperature

Mars

−23 degrees Celsius

Mercury

-279 Fahrenheit (-173 Celsius)

Age

Mars

4.603 billion years

Mercury

4.6 billion years