Discovery Channel


There are at least 95 moons spinning around the nine planets
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Observing Space

Introduction

Telescopes

Invisible Astronomy

Section 1.4

Section 1.5

Section 1.6

Section 1.7

Section 1.8

Section 1.9

Section 1.10

Section 1.11

Section 1.12

Section 1.13

Section 1.14

Section 1.15

Exploring Space

Introduction

Pioneers

Shuttles

Launchers

ISS

USA in Space

UK in Space

China in Space

France in Space

Russia in Space

The X-Prize

Section 2.12

Section 2.13

Section 2.14

Section 2.15

Planets

Introduction

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

Pluto

Section 3.11

Section 3.12

Section 3.13

Section 3.14

Section 3.15

Moons

Section 4.1

Section 4.2

Section 4.3

Section 4.4

Section 4.5

Section 4.6

Section 4.7

Section 4.8

Section 4.9

Section 4.10

Section 4.11

Section 4.12

Section 4.13

Section 4.14

Section 4.15

Stars

Introduction

The Sun

Sirius

Canopus

Alpha Centauri

Arcturus

Others

Section 5.8

Section 5.9

Section 5.10

Section 5.11

Section 5.12

Section 5.13

Section 5.14

Section 5.15

Comets, Meteors & Asteroids

Deep Impact Mission

Section 6.2

Section 6.3

Section 6.4

Section 6.5

Section 6.6

Section 6.7

Section 6.8

Section 6.9

Section 6.10

Section 6.11

Section 6.12

Section 6.13

Section 6.14

Section 6.15

Galaxies

Section 7.1

Section 7.2

Section 7.3

Section 7.4

Section 7.5

Section 7.6

Section 7.7

Section 7.8

Section 7.9

Section 7.10

Section 7.11

Section 7.12

Section 7.13

Section 7.14

Section 7.15

The Universe

Section 8.1

Section 8.2

Section 8.3

Section 8.4

Section 8.5

Section 8.6

Section 8.7

Section 8.8

Section 8.9

Section 8.10

Section 8.11

Section 8.12

Section 8.13

Section 8.14

Section 8.15

Eclipses

Solar Eclipse

Lunar Eclipse

Lunar Eclipse 2008

What Eclipses Have Taught Us

Significant Eclipses in History

The Blood Red Moon

Section 9.7

Section 9.8

Section 9.9

Section 9.10

Section 9.11

Section 9.12

Section 9.13

Section 9.14

Section 9.15

Amazing Facts

Section 10.1

Section 10.2

Section 10.3

Section 10.4

Section 10.5

Section 10.6

Section 10.7

Section 10.8

Section 10.9

Section 10.10

Section 10.11

Section 10.12

Section 10.13

Section 10.14

Section 10.15

Play: Comet Impact

Section 11.1

Section 11.2

Section 11.3

Section 11.4

Section 11.5

Section 11.6

Section 11.7

Section 11.8

Section 11.9

Section 11.10

Section 11.11

Section 11.12

Section 11.13

Section 11.14

Section 11.15

Space Blog

Section 12.1

Section 12.2

Section 12.3

Section 12.4

Section 12.5

Section 12.6

Section 12.7

Section 12.8

Section 12.9

Section 12.10

Section 12.11

Section 12.12

Section 12.13

Section 12.14

Section 12.15

Section 13

Section 13.1

Section 13.2

Section 13.3

Section 13.4

Section 13.5

Section 13.6

Section 13.7

Section 13.8

Section 13.9

Section 13.10

Section 13.11

Section 13.12

Section 13.13

Section 13.14

Section 13.15

Section 14

Section 14.1

Section 14.2

Section 14.3

Section 14.4

Section 14.5

Section 14.6

Section 14.7

Section 14.8

Section 14.9

Section 14.10

Section 14.11

Section 14.12

Section 14.13

Section 14.14

Section 14.15

Section 15

Section 15.1

Section 15.2

Section 15.3

Section 15.4

Section 15.5

Section 15.6

Section 15.7

Section 15.8

Section 15.9

Section 15.10

Section 15.11

Section 15.12

Section 15.13

Section 15.14

Section 15.15

Planets

Neptune

Neptune is named after the Roman god of the sea and its main moon, Triton, is named after the three-pronged spear the god carried.

Neptune is often seen as Uranus’ twin planet; they are more or less the same size, both blue in colour and formed by similar gases.

The fastest winds in the Solar System were recorded on Neptune at 2,000km/h (1,240miles/h). At points during its orbit, Neptune passes Pluto and becomes the furthest planet from the Sun.

We haven’t seen it pass through a complete orbit since it was discovered in 1846, because it takes 165 years!

Average distance from the Sun: 4,504,000,000 km
(2,800,000,000 miles)

Length of year: 165 Earth years

Diameter: 49,528km (30,775 miles)

Average temperature: -364°F (-220°C)

Photos: NASA

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