Here's a even more beautiful variation I've seen : http://interconnected.org/home/more/lightcone/ http://interconnected.org/home/more/lightcone/ It takes a bir

Here's a even more beautiful variation I've seen : http://interconnected.org/home/more/lightcone/ http://interconnected.org/home/more/lightcone/ It takes a birth date and tells you when your personal light cone passes nearby stars.