Pennsylvania stargazers have the chance to see a “planet parade” this January, with four bright planets to be visible in a single line of sight. Venus, Saturn, Jupiter and Mars will be visible ...

Illinois stargazers have the chance to see a “planet parade” this January, with four bright planets to be visible in a single line of sight. Venus, Saturn, Jupiter and Mars will be visible together ...

For example, Jupiter is the most massive planet in our solar system. It’s so big, it could swallow 1,000 Earths. So it requires a very high escape speed: 133,100 mph (about 214,000 kilometers per hour ...