vs

Mercury vs. Sun , which is better?

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.

The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process.

comparman

compargram

@comparman


Difference and similar

Absolute magnitude

Mercury

-0.6

Sun

4.83

Visual brightness

Mercury

Sun

−26.74

Mean distance from Earth

Mercury

77 million km)

Sun

1 au ≈ 1.496×108 km

Spectral classification

Mercury

398.4 nm

Sun

G2V

Metallicity

Mercury

0.3 AU

Sun

Z = 0.0122

Angular size

Mercury

Sun

31.6–32.7 minutes of arc

Adjectives

Mercury

Mercurian

Sun

Solar

Galactic period

Mercury

Sun

2.25–2.50)×108 yr

Velocity

Mercury

0.387 AU = 5.79x107 km

Sun

  • ≈ 220 km/s (orbit around the center of the Milky Way)
  • ≈ 20 km/s (relative to average velocity of other stars in stellar neighborhood)
  • ≈ 370 km/s (relative to the cosmic microwave background)

Equatorial radius

Mercury

2,440 km

Sun

695,700 km

Equatorial circumference

Mercury

15,329 km

Sun

4.379×106

Flattening

Mercury

< 0.0006

Sun

9×10−6

Surface area

Mercury

74.8 million km²

Sun

6.09×1012 km2

Volume

Mercury

6.083 x 1010 cubic kilometers

Sun

1.41×1018 km3

Mass

Mercury

3.285 × 10^23 kg

Sun

(1.98855±0.00025)×1030 kg

Average density

Mercury

5.43 g/cm³

Sun

1.408 g/cm3

Center density

Mercury

5.4 g/cm3

Sun

162.2 g/cm3

Equatorial surface gravity

Mercury

10.892 km/h

Sun

274.0 m/s2

Moment of inertia factor

Mercury

Sun

0.070 (estimate)

Escape velocity

Mercury

4.25 km/s

Sun

617.7 km/s

Temperature

Mercury

-279 Fahrenheit (-173 Celsius)

Sun

  • Center (modeled): 1.57×107 K
  • Photosphere (effective): 5,772 K
  • Corona: ≈ 5×106 K

Luminosity

Mercury

Sun

3.828×1026

Mean radiance

Mercury

Sun

2.009×107 W·m−2·sr−1

Age

Mercury

4.6 billion years

Sun

≈ 4.6 billion years