The Strangest In The World

What's better than a moon? A moon orbiting a moon, which the internet has dubbed a moonmoon. Also known as submoons, moonitos, grandmoons, moonettes and moooons, moonmoons are still only theoretical, but recent calculations suggest that there's nothing impossible about their formation. Perhaps astronomers may one day discover one.Dark matter — the unknown substance comprising 85 percent of all matter in the universe — is strange. But researchers are at least sure about one thing: Dark matter is everywhere. So team members were scratching their heads over a peculiar galaxy they spotted in March 2018 that seemed to contain hardly any dark matter. Subsequent work suggested that the celestial oddity did in fact contain dark matter, though the finding paradoxically lent credence to an alternative theory positing that dark matter doesn't exist at all. Get it together, astronomers!