In 1675, Giovanni Domenico Cassini determined that Saturn's ring was composed of multiple smaller rings with gaps between them; the largest of these gaps was later named the Cassini Division. This division is a 4,800-km-wide region between the A ring and B Ring.

saturn

Saturn is the least dense planet in the Solar System

Saturn has a density of 0.687 grams/cubic centimeter. Just for comparison, water is 1 g/cm3 and the Earth is 5.52. Since Saturn is less dense than water, it would actually float like an apple if you could find a pool large enough. Of course, why you’d want to ruin a pool with all that hydrogen, helium and ices

Diameter is: 116,464 km

Distance from Sun is: 1.434 billion km

EARTH

Earth is the third planet from the Sun and is the largest of the terrestrial planets. The Earth is the only planet in our solar system not to be named after a Greek or Roman deity. The Earth was formed approximately 4.54 billion years ago and is the only known planet to support life.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite.

NEPTUNE

In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth and slightly larger than Neptune.

Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet.

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.

Radius: 2,440 km

Distance from Sun: 57.91 million km

Orbital period: 88 days

Surface area: 74.8 million km²

Did you know: It rotates with respect to the sun only once every 59 earth days.

every 59 earth days.

URANUS

Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both have bulk chemical compositions which differ from that of the larger gas giants Jupiter and Saturn.

Uranus was officially discovered by Sir William Herschel in 1781. Uranus turns on its axis once every 17 hours, 14 minutes. Uranus makes one trip around the Sun every 84 Earth years. Uranus is often referred to as an “ice giant” planet. Uranus hits the coldest temperatures of any planet.

JUPITER

Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two-and-a-half times that of all the other planets in the Solar System combined.

Radius: 69,911 km

Mass: 1.898 × 10^27 kg (317.8 M⊕)

Distance from Sun: 778.5 million km

Surface area: 61.42 billion km²

Moons: Europa, Ganymede, Io, Callisto

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has the longest rotation period of any planet in the Solar System and rotates in the opposite direction to most other planets. It does not have any natural satellites. It is named after the Roman goddess of love and beauty.

Distance from Sun: 108.2 million km

Radius: 6,052 km

Orbital period: 225 days

Surface area: 460.2 million km²

Did you know: Without seismic data or knowledge of its moment of inertia, little direct information is available about the internal structure and geochemistry of Venus.

VENUS