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One of the greatest astronomers of all time was a Danish nobleman with a metal nose, who was also a publisher, an alchemist and the Imperial Mathematician. His astronomical observations were the key to the modern view of the Solar System.
Uranus and Neptune - Twin Planets
Uranus and Neptune are ice giants and twin planets. They are very similar in many ways, but they aren't identical twins. For example, Uranus orbits lying down and Neptune is much warmer than it should be.
Uranus Facts for Kids
This ice giant is twenty times farther from the Sun than we are. It orbits lying on its side so that half the planet can be dark for over twenty years at a time. This is the planet Uranus, discovered by William Herschel in 1871 and nearly named George!
Venus Facts for Kids
It's the planet most likely to mistaken for a UFO. It spins backwards on its axis. A day is longer than a year. It's Venus! Some call it Earth's twin, but I think you'll see that we don't have all that much in common.
Volcanoes - Fire and Ice
A volcano can produce a fiery sky with ash and deadly gases. The biggest one on Earth is Mauna Loa, but it's dwarfed by Olympus Mons on Mars which is three times the height of Everest. There are many volcanoes in the Solar System, including ice volcanoes.
Voyager 1 – Gas Giants and a Last Look Homeward
When a rare planetary alignment opened up the outer Solar System, Voyager 1 was sent forth. It observed the gas giants Jupiter and Saturn and their moons. At nearly 4 billion miles from the Sun, the probe turned and took one last picture of home before continuing its journey to the stars.
Voyager 2 - The Grand Tour
Most of our knowledge of Neptune and Uranus is based on Voyager 2's visits. Its grand tour of the four giant planets used a rare alignment of the planets that let the gravity of each one boost the spacecraft to the next one. No other probe has been to either of the ice giants.
Voyagers - Preparing for the Grand Tour
In 2013 Voyager 1 became the first starship as it slipped into interstellar space, the space between the Sun and the stars. What was a NASA probe doing twelve billion miles from home? What was the origin of its 36-year mission?
Voyagers - the Golden Record
The Voyagers are on a mission that will eventually take them to the stars. They are both carrying a message from Earth. What images, sounds and music were chosen to represent the people of Earth?
Water on the Moon
Everybody had known for a long time that the Moon was bone dry. In the nineties probes found some evidence of water. After a big announcement of water on the Moon, it went back again to being described as dry. What's the story in the 21st century?
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