Ringed Earths

A new study points out that rocky worlds like Earth could have rings, too.

In fact, it says astronomers may have already found some without recognizing it.

Planet Nine

Astrophysicists studying the orbits of small objects deep in the Solar System think they have more evidence for a massive, hitherto undiscovered ninth planet.

Planet Nine would be 10 times as massive as Earth and orbit the Sun at about 600 times Earth's distance.

China Moon

China just completed a year long study of humans aboard a simulated lunar base.

China plans to put people on the Moon in the next decade.

Lunar Dust

The bad news is that a new study suggests that lunar dust is extremely toxic to human cells.

The good news is that NASA is already working the problem.

Perspective

Walmart has announced quarterly revenues of $122.69 billion.

That means it could fund NASA at NASA's current annual budget level and still have revenues of well over $100 billion for that quarter.

Parallel Aliens

Two new studies suggest life could exist in parallel universes.

The studies were conducted by computer simulations.

Musk

Elon Musk says SpaceX hopes to launch the same Block 5 Falcon 9 twice within 24 hours next year.

That would be completely unprecedented/