Ever wondered how many Earths would add up to one Jupiter? How many Saturns would balance out one Sun? Find out with one of our favorite websites ever, the Planet Mass Comparison. Click one of the pictures below to try it yourself:
One Neptune = 9,501 Plutos!
14 Earths = 1 Uranus.
OK, OK, there’s actually no cosmic scale out in space weighing planets. This is actually measuring mass, which is a bit different than weight. Weight depends on where you’re standing. For example, you’d “weigh” a LOT more if you were on Jupiter or the Sun. (Not that you would survive long enough to get on a scale.) You even weigh a tiny bit less when you’re up in the mountains than you would at sea level. But you are the same size, with the same amount of “matter” inside your body, no matter where you are.
Voyager was launched shortly before I was born and has now left the solar system. There is a lot of empty space between stars, so it doesn’t have much to take pictures of right now.
The first Star Trek movie ever made was about what might happen to Voyager if it keeps going on and on and learning more and more… not exactly realistic, but interesting.
Jupiter’s moon Io, the most volcanically active place in the solar system.
Top 5 Reasons Europa Rocks!
Aliens of the Deep and Mission to Europa – explains how it’s possible for life to exist away from the Sun’s energy. Could one of Jupiter’s moons also contain life?
A futuristic, fictional look at what exploration of Europa might look like.
Did you see the Moon and two very bright objects in the night sky over the past few days? The two dots look like stars, but they are actually planets. Venus and Jupiter are both very close to Earth right now and so you can see them in the night sky along with the Moon.