It can fit six people in total. You can see how many are up there right now.
It might not be a planet anymore, but Pluto has more moons than Earth does.
Since Pluto was demoted to dwarf planet in 2006, there are only eight planets in the solar system.
It's at Saturn's north pole, and has wind speeds of up to 330 miles per hour.
Saturn and MarsSaturn, Mercury and VenusSaturn, Jupiter, Uranus and Neptune
Saturn, Jupiter, Uranus and Neptune.
All four gas giants have rings (but Saturn's are more noticeable than the others).
The Sun's visible surface – the photosphere – is around 5778K, or around 5505°C.
5500 Kelvin100,000–200,000 Kelvin1–2 million Kelvin
1–2 million Kelvin.
Scientists don't understand why, but the Sun's corona is much hotter than its surface. Some regions even reach 20 million degrees.
It's a picture of the Australian outback, taken by Chris Hadfield from the International Space Station.
Turns out Mars has a lot more ice than we anticipated. And it looks a bit like a brain.
Triton is actually a moon of Neptune. Vesta is an asteroid and Ceres is a dwarf planet that orbits in the asteroid belt.
Neil ArmstrongNASAYuri GagarinJohn GlennUnited States Marine Corps
He orbited Earth in his Vostok spacecraft on 12 April 1961.
March 1961April 1977January 1984
Frogs were included on the Vostok 3A launches into low Earth orbit in 1961. A previous attempt in 1959 had been made to send frogs to space, but the rocket was destroyed during launch.
Io is a moon of Jupiter.
1 million years5 billion years100 billion years
5 billion years.
Hopefully enough time for us all to decamp somewhere that won't get fried during the expansion.
January 2010August 2012September 2013
There have been various reports over the last few years of Voyager leaving the solar system. But definitive word came from Voyager project scientist Ed Stone and team recently when they announced that Voyager left the solar system on August 25, 2012.
51 Pegasi b.
It was discovered in 1995. Fomalhaut b was discovered in 2008 and Alpha Centauri Bb in 2012.
100–400 billion1–4 billion100,000–400,000
3.8 billion years10 billion years13.8 billion years
13.8 billion years.
That's how long it's been since the Big Bang.
The first is the Carina Nebula, and the last is part of the Eagle Nebula.