The report of an alien sighting at a Las Vegas home made headlines around the world. The reported sighting was triggered when a mysterious fireball was seen falling from the sky. That's when numerous calls came to 911 with one Las Vegas caller claiming an alien was in their backyard. Astrophysicist Jason Steffen says it was a meteor, not a spaceship, and it probably landed in the ocean.

The claim: Radar technology wouldn’t work if the Earth was a globe. Our rating: False.

Redshift and blueshift are used by astronomers to work out how far an object is from Earth.

Some planets outside our solar system are thought to be tidally locked, with one side always facing their star, creating a world divided into hot and cold. Now, it seems this set-up may not be permanent after all, allowing the two sides to flip.

The answer is complicated. It depends on what you mean by efficiency, as well as on some pretty important assumptions.

The harshest arctic winters have got nothing on the chill from deep space. The James Webb Space Telescope (JWST) continues to provide gifts for scientists and space enthusiasts with its latest discovery: ice found within the deepest reaches of an interstellar molecular cloud. As reported in the journal Nature Astronomy, the JWST measured the frozen molecules at minus 440 degrees Fahrenheit (minus 263 degrees Celsius).

NASA’s long in-development ARTEMIS lunar space missions completed its first phase last month. The idea is to land someone on the moon in two years. Then from there, head to Mars. And the University of Nevada, Las Vegas is helping out.

Flat Earth theory, the erroneous idea that the Earth is flat, continues to persist online despite overwhelming evidence to the contrary.