This week’s viewer question comes from Chris Humfreez. He asks why the earth has an atmosphere.
A Japanese mission called Martian Moons eXploration aims to be the first to bring back rocks from the Mars region. It could also help humans land on Phobos.
Once every 20 years, the planets Jupiter and Saturn pass each other in what's called a great conjunction. This year's is their closest meeting in 400 years.
Europe's space agency, ESA, and America's NASA are collaborating to protect Earth from an asteroid collision. The target: A double asteroid called Didymos.
NASA's Perseverance rover has special cargo: A first helicopter to test flight on Mars. Here's an overview of the facts.
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