da: A smiling human with short hair, head tilted a bit to the right. It's black and white with a neutral background. You can't tell if the white in the hair is due to lighting, or maybe it's white hair! (night)
da ([personal profile] da) wrote2010-03-05 04:09 pm
Entry tags:

Personal Light Cone

OK, this is seriously geeky, but I love it:

Exhibit A: Distance of stars from us, in light-years, and other information.

Exhibit B: definition of Light Cone.

Exhibit C:Your Personal Light Cone RSS feed.

"From the moment of my birth, light (that I could have influenced) has been expanding around the Earth and light (which could influence me, from an increasing distance of origin) reaching it -- this ever-growing sphere of potential causality is my light cone." My light cone has 61 stars in it. The next star to be reached is Beta Leonis, 4 months from now.

Hat-tip to [livejournal.com profile] james_nicoll.