The Solar System The Planets Inner Solar System Mercury

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Mercury

Aaron Bowman

@mr_bowman

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Aaron Bowman

@mr_bowman

What Is the Planet Mercury? | NASA
Mercury is the smallest of the eight planets and is closest to the sun.
https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-planet-mercury-k4.html
All About Mercury :: NASA Space Place
The smallest planet in our solar system
https://spaceplace.nasa.gov/all-about-mercury/en/
Planet Mercury: Facts About the Planet Closest to the Sun
Mercury is the smallest planet in our solar system and is known for its short years, long days, extreme temperatures and weird sunsets.
https://www.space.com/36-mercury-the-suns-closest-planetary-neighbor.html
Mercury: Educational facts and history of the planet Mercury - Nine Planets
Mercury is the closest planet to the Sun and the eighth largest. Mercury is slightly smaller in diameter than the moons Ganymede and Titan but more than twice as massive. Facts about Mercury.
http://nineplanets.org/mercury.html
Mercury Facts - Interesting Facts about Planet Mercury
Mercury is the closest planet to the Sun and due to its proximity it is not easily seen except during twilight. For every two orbits of the Sun, Mercury completes three rotations about its axis and up until 1965 it was thought that the same side of Mercury constantly faced the Sun.
https://space-facts.com/mercury/
Planet Mercury | Space School - YouTube
Ice has been found on Mercury! What's the climate like? What about the atmosphere itself? Could there be life? Learn more here! As excited as we are, some of...
https://www.youtube.com/watch?v=6KY-oB2i9lo
Mercury Is the Inspectah Deck of Planets - The Atlantic
Tiny and overlooked, the nearest world to the sun could destroy the entire solar system.
https://www.theatlantic.com/science/archive/2017/06/mercury-aint-nothin-to-with/523365/
Mercury Information and Facts | National Geographic
Learn more about the first planet in our solar system from National Geographic.
https://www.nationalgeographic.com/science/space/solar-system/mercury/
Mercury (planet)
Wikipedia
https://en.wikipedia.org/wiki/Mercury_(planet)

Comments

Mercury

Mercury in true color (by MESSENGER in 2008)

Designations

Pronunciation

/ˈmɜːrkjʊri/

Adjectives

Mercurian /mərˈkjʊəriən/,^[1]
Mercurial /mərˈkjʊəriəl/^[2]

Symbol

Orbital characteristics^[3]

Epoch J2000

Aphelion

0.466697 AU (69.82 million km)

Perihelion

0.307499 AU (46.00 million km)

Semi-major axis

0.387098 AU (57.91 million km)

Eccentricity

0.205630^[4]

Orbital period (sidereal)

87.9691 d
0.240846 yr
0.5 Mercury synodic days

Orbital period (synodic)

115.88 d^[4]

Average orbital speed

47.36 km/s^[4]

Mean anomaly

174.796°

Inclination

7.005° to ecliptic
3.38° to Sun's equator
6.35° to invariable plane^[5]

Longitude of ascending node

48.331°

Argument of perihelion

29.124°

Satellites

None

Physical characteristics

Mean radius

2,439.7±1.0 km^[6]^[7]
0.3829 Earths

Flattening

0.0009^[4]

Surface area

7.48×10⁷ km²^[6]
0.147 Earths

Volume

6.083×10¹⁰ km³^[6]
0.056 Earths

Mass

3.3011×10²³ kg^[8]
0.055 Earths

Mean density

5.427 g/cm³^[6]

Surface gravity

3.7 m/s² (0.38 g₀)^[6]

Moment of inertia factor

0.346±0.014^[9]

Escape velocity

4.25 km/s^[6]

Synodic rotation period

176 d^[10]

Sidereal rotation period

58.646 d
1407.5 h^[6]

Equatorial rotation velocity

3.026 m/s

Axial tilt

2.04′ ± 0.08′ (to orbit)^[9]
(0.034°)^[4]

North pole right ascension

18^h 44^m 2^s
281.01° ^[4]^[11]

North pole declination

61.41° ^[11]

Albedo

0.088 (Bond)^[12]
0.142 (geom.)^[13]

Temperature

437 K (164 °C) (blackbody temperature)^[14]

Surface temp.	min	mean	max
0°N, 0°W ^[15]	−173 °C	67 °C	427 °C
85°N, 0°W^[15]	−193 °C	−73 °C	106.85 °C

Apparent magnitude

−2.48 to +7.25^[16]

Absolute magnitude (H)

−0.4^[17]

Angular diameter

4.5–13″^[4]

Atmosphere^[4]^[18]^[19]

Surface pressure

trace (≲ 0.5 nPa)

Composition by volume

atomic oxygen
sodium
magnesium
atomic hydrogen
potassium
calcium
helium
Trace amounts of iron, aluminium, argon, dinitrogen, dioxygen, carbon dioxide, water vapor, xenon, krypton, and neon

Source : Wikipedia under CC-BY-SA license

Links
Media

What Is the Planet Mercury? | NASA
Mercury is the smallest of the eight planets and is closest to the sun.
https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-planet-mercury-k4.html
All About Mercury :: NASA Space Place
The smallest planet in our solar system
https://spaceplace.nasa.gov/all-about-mercury/en/
Planet Mercury: Facts About the Planet Closest to the Sun
Mercury is the smallest planet in our solar system and is known for its short years, long days, extreme temperatures and weird sunsets.
https://www.space.com/36-mercury-the-suns-closest-planetary-neighbor.html
Mercury: Educational facts and history of the planet Mercury - Nine Planets
Mercury is the closest planet to the Sun and the eighth largest. Mercury is slightly smaller in diameter than the moons Ganymede and Titan but more than twice as massive. Facts about Mercury.
http://nineplanets.org/mercury.html
Mercury Facts - Interesting Facts about Planet Mercury
Mercury is the closest planet to the Sun and due to its proximity it is not easily seen except during twilight. For every two orbits of the Sun, Mercury completes three rotations about its axis and up until 1965 it was thought that the same side of Mercury constantly faced the Sun.
https://space-facts.com/mercury/
Planet Mercury | Space School - YouTube
Ice has been found on Mercury! What's the climate like? What about the atmosphere itself? Could there be life? Learn more here! As excited as we are, some of...
https://www.youtube.com/watch?v=6KY-oB2i9lo
Mercury Is the Inspectah Deck of Planets - The Atlantic
Tiny and overlooked, the nearest world to the sun could destroy the entire solar system.
https://www.theatlantic.com/science/archive/2017/06/mercury-aint-nothin-to-with/523365/
Mercury Information and Facts | National Geographic
Learn more about the first planet in our solar system from National Geographic.
https://www.nationalgeographic.com/science/space/solar-system/mercury/
Mercury (planet)
Wikipedia
https://en.wikipedia.org/wiki/Mercury_(planet)

Mercury

Mercury in true color (by MESSENGER in 2008)

Designations

Pronunciation

/ˈmɜːrkjʊri/

Adjectives

Mercurian /mərˈkjʊəriən/,^[1]
Mercurial /mərˈkjʊəriəl/^[2]

Symbol

Orbital characteristics^[3]

Epoch J2000

Aphelion

0.466697 AU (69.82 million km)

Perihelion

0.307499 AU (46.00 million km)

Semi-major axis

0.387098 AU (57.91 million km)

Eccentricity

0.205630^[4]

Orbital period (sidereal)

87.9691 d
0.240846 yr
0.5 Mercury synodic days

Orbital period (synodic)

115.88 d^[4]

Average orbital speed

47.36 km/s^[4]

Mean anomaly

174.796°

Inclination

7.005° to ecliptic
3.38° to Sun's equator
6.35° to invariable plane^[5]

Longitude of ascending node

48.331°

Argument of perihelion

29.124°

Satellites

None

Physical characteristics

Mean radius

2,439.7±1.0 km^[6]^[7]
0.3829 Earths

Flattening

0.0009^[4]

Surface area

7.48×10⁷ km²^[6]
0.147 Earths

Volume

6.083×10¹⁰ km³^[6]
0.056 Earths

Mass

3.3011×10²³ kg^[8]
0.055 Earths

Mean density

5.427 g/cm³^[6]

Surface gravity

3.7 m/s² (0.38 g₀)^[6]

Moment of inertia factor

0.346±0.014^[9]

Escape velocity

4.25 km/s^[6]

Synodic rotation period

176 d^[10]

Sidereal rotation period

58.646 d
1407.5 h^[6]

Equatorial rotation velocity

3.026 m/s

Axial tilt

2.04′ ± 0.08′ (to orbit)^[9]
(0.034°)^[4]

North pole right ascension

18^h 44^m 2^s
281.01° ^[4]^[11]

North pole declination

61.41° ^[11]

Albedo

0.088 (Bond)^[12]
0.142 (geom.)^[13]

Temperature

437 K (164 °C) (blackbody temperature)^[14]

Surface temp.	min	mean	max
0°N, 0°W ^[15]	−173 °C	67 °C	427 °C
85°N, 0°W^[15]	−193 °C	−73 °C	106.85 °C

Apparent magnitude

−2.48 to +7.25^[16]

Absolute magnitude (H)

−0.4^[17]

Angular diameter

4.5–13″^[4]

Atmosphere^[4]^[18]^[19]

Surface pressure

trace (≲ 0.5 nPa)

Composition by volume

atomic oxygen
sodium
magnesium
atomic hydrogen
potassium
calcium
helium
Trace amounts of iron, aluminium, argon, dinitrogen, dioxygen, carbon dioxide, water vapor, xenon, krypton, and neon

Source : Wikipedia under CC-BY-SA license

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