The Bortle Scale
The Bortle scale is a nine-level numeric scale that measures the night sky’s brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution. John E. Bortle created the scale and published it in the February 2001 edition of Sky & Telescope magazine to help amateur astronomers evaluate the darkness of an observing site, and secondarily, to compare the darkness of observing sites. The scale ranges from Class 1, the darkest skies available on Earth, through Class 9, inner-city skies.
hey canadians have fun at school tomorrow
hey americans have fun paying your health care
stop guys we’re friends remember
Children, behave else mother shall have to give the pair of you a bollocking.
You couldn’t beat 13 states, let alone 50.
what’s going on over here?
I just choked
tumblr country wars are the best
DC Hero Profiles: The Series
This is the full DC Hero Profiles series thus far. There are a ton of characters I still want to include… Doctor Fate, Robin, Batgirl, Blue Devil, the Atom, etc. I love the #DCU and have really enjoyed building this series! If you have a character suggestion, I’d love to hear from you.
this is probably the only sex gif i will every reblog, because for some reason i feel like it’s more than just sex. i don’t know if it’s how they’re actually looking at one another or the way they can’t get close enough. he’s actually looking at her like a person and not just a sex object. but then again, it could be all in my head. i mean, this is how i would want it to be. but that’s just me