[UNWARRANTED AMERICAN DECLARATION OF FREEDOM]
Well. That escalated quickly.
brother bear, i let you down
you trusted me, believed in me and i let you down
Dylan, my 12 year old brother (via ultimateslice)
The color of the Aurora depends on the altitude and the atom being struck by solar radiation (causing excitation). At higher altitudes, there is more Atomic Oxygen than Nitrogen, leading to the common color stratifications you see.
500-200 km altitude
— Atomic Oxygen — Red
— Atomic Oxygen — Greenish-Yellow
— Ionized Nitrogen — Blue/Purple
— Nitrogen (N2) — Crimson
Oxygen only emits red at higher altitudes because once it’s excited, it takes a longer time to emit red than it does green. Why is that important? Well, at lower altitudes there is more Nitrogen for the Oxygen to bump into and absorb that excitation-energy before it gets a chance to emit red light. In this case, where the collision occurs, the Oxygen will emit Green and at low enough altitudes the Nitrogen-Oxygen collisions eventually prevent Oxygen from emitting any light at all.
During stronger storms, high energy solar particles will reach lower in the atmosphere and cause the Crimson emission from Nitrogen, creating a deep-red band at the lower edge of the aurora. Other elements emit light too, like Hydrogen (Blue) or Helium (Purple) which are at higher altitudes.
it felt like i knew you…, 2012 - ongoingI ride the NYC subway trains, usually in the evening when the seats are full. I focus on the shape of the space between the person sitting next to me and myself. I attempt to mentally and emotionally re-sculpt that space. In my mind, I reshape it- from the stiff and guarded space between strangers to the soft and yielding space between friends. I direct all my energy to this space between us. When the space palpably changes, and I completely feel like the stranger sitting next to me is my friend, I rest my head on that person’s shoulder.