NASA has confirmed the existence of a new second moon which will orbit Earth for quite some time. If you’ve gotten used to only having the one moon, it’s time to adapt, because now that we’ve got two, you’re going to have to get used to people asking ‘which one’ when we talk about the bigger of the two.

The race for quiet supersonic flight takes a leap forward with NASA's X-59. But what challenges remain before it becomes a reality?

A small companion has been following Earth's exact path around the sun, with astronomers calling the object a quasi-moon