So Cruithne is our second moon. What’s it like there? Well, we don’t really know. It’s only about 5 kilometers across, which is not dissimilar to the dimensions of the comet 67P/Churyumov-Gerasimenko, ...

Here’s what you need to know about 3753 Cruithne and what its weird orbit reveals about the solar system. As recently as 1997, we discovered that another body, 3753 Cruithne, is a quasi-orbital ...

Cruithne orbits the sun about once a year, but it takes nearly 800 years to complete this messy ring shape around the Earth’s orbit. Cruithne close up So Cruithne is our second moon.

As recently as 1997, we discovered that another body, 3753 Cruithne, is what’s called a quasi-orbital satellite of Earth. This simply means that Cruithne doesn’t loop around the Earth in a nice ...

Cruithne orbits the sun about once a year, but it takes nearly 800 years to complete this messy ring shape around the Earth’s orbit. Cruithne close up So Cruithne is our second moon.

Cruithne is expected to undergo a rather close encounter with Venus in about 8,000 years, however. There’s a good chance that that will put paid to our erstwhile spare moon, flinging it out of ...

Here's the best picture we have of this tiny, rocky "moon" that's only about 3 miles across. Because of its small size, astronomers need powerful instruments to see Cruithne.

Here's the best picture we have of this tiny, rocky "moon" that's only about 3 miles across. Because of its small size, astronomers need powerful instruments to see Cruithne.

Viewed from Earth, Cruithne is seen to weave a bean-shaped path, coming closest at a distance of 12,500,000 kilometres away – a habit that has lent it the nickname of the Earth’s “second moon”. Relic ...

As recently as 1997, we discovered that another body, 3753 Cruithne, is what’s called a quasi-orbital satellite of Earth. This simply means that Cruithne doesn’t loop around the Earth in a nice ...

Sure, we’ve launched hundreds of man-made objects into the space around Earth, but even before we got there, Earth and the Moon had a little companion. This tiny, rocky world is named 3753 Cruithne ...

That's because Cruithne is more gravitationally bound to the sun than Earth, and for that reason it does not qualify as our moon. To compare, the moon, which is more gravitationally bound to Earth ...