Behold, our planet Earth. The dots you see hovering above us are not aliens. I mean, they could be. I'm not saying they are. But if aliens were to arrive, they'd show up on here first. As newly discovered little blips of light that weren't there yesterday. They always turn out to be asteroids or comets though, like 99.99% of the time (the other time it was 'Oumuamua 1I/2017 U1).
Are we going to die?
Yes, 100%. You might even die because of one of these dots. It's happened before.
Holy crap, what are we gunna do?!
First, we need to work out if one of these things is heading towards us. And the best way to do that is to point your telescope at one, take some photos, solve them astrometrically and send your data to the International Astronomical Union via the MPC website reporting thingy. Then really smart people will confirm whether it's coming towards us and if we're going to die.
And then what?
Oh, then we die. Seriously, we can't even stop a kid with a handgun. Good luck with that.
*Distances Not to Scale
**NEO Updates every 15 minutes
***Cloud layer updates every 24 hours
C R E D I T S
Developed by Dylan O'Donnell
Near Earth Object Data from the Minor Planet Center (IAU)
Daily Cloud Map Data from X Planet Clouds
3D example code modified from Jos Dirksen.
Three.js library by Ricardo Cabello