Facts about the Solar System

The Terrestrial planets – Mercury, Venus, Earth and Mars
The Jovian planets – Jupiter, Saturn, Uranus, Neptune
The Dwarf planets – Ceres, Pluto, Haumea, Makemake and Eris
Ceres lies in the asteroid belt, Pluto, Haumea and Makemake lie in the Kuiper belt and Eris lies beyond the Kuiper belt.
The brightest planet as seen from Earth – Venus
The planet also known as Earth’s twin – Venus
The planet, which rotates in a direction opposite to that of others – Venus
The planet, which has prominent rings around it – Saturn
Planets which have no satellites – Mercury & Venus
The planet with the longest day – Venus (243 earth-days)
The planet with the shortest day – Jupiter (9 hrs 55 mts)
The planet also known as Evening/Morning star – Venus
The star nearest to the earth – Proxima Centauri
The hottest planet in the solar system – Venus (Maximum temp: 462° C)
The coldest planet in the solar system – Uranus (Effective temp: - 216° C)
The planet with the highest density in the solar system – Earth
The planet with the lowest density in the solar system – Saturn
The largest satellite in the solar system – Ganymede (Satellite of the Jupiter)
The planet also known as the Red Planet – Mars
The highest known mountain in the solar system – Olympus Mons on Mars
The planet whose density is less than that of water – Saturn
The planet with highest surface gravity (meter per square second) is – Jupiter (24.92)
The planet with lowest surface gravity (meter per square second) is – Mercury (3.7)
The space between Mars and Jupiter consisting of millions of asteroids is knowns as the – asteroid belt
The largest asteriod also known as a dwarf planet – Ceres
The disc-shaped region of icy bodies and comets beyond the orbit of Neptune is known as – Kuiper belt
Halley's comet last appeared in 1986 and is expected to appear next in – 2061
The galaxy nearest to the milky way – Andromeda

Planets - Rotation & Revolution Periods

PlanetRotation PeriodRevolution Period
Mercury58.65 Earth Days87.97 Earth Days
Venus243 Earth Days224.7 Earth Days
Earth23.93 Earth Hours365.26 Earth Days
Mars24.62 Earth Hours686.93 Earth Days
Jupiter9.8 Earth Hours11.86 Earth Years
Saturn10.2 Earth Hours29.46 Earth Years
Uranus17.9 Earth Hours83.75 Earth Years
Neptune19.1 Earth hours163.72 Earth Years