Eight million light years away lies galaxy NGC 2403. Spanning nearly 50,000 light years in diameter, the galaxy displays its incredible spiral arms with hot young stars in blue and glowing star-formation regions in red.
Credit: Canada-France-Hawaii Telescope/Coelum
#astronomy #galaxy #universe #science #stars
Messier 51 Galaxy, taken by the Chandra X-ray Observatory
This Mexican fire opal looks like a sunset above the clouds when illuminated just right.
Image credit: Jeff Schultz
Don’t know what’s funnier. Voldemort with a nose, Dumbledore reading his lines, or Bellatrix with a coffee, making fun of Voldy
or the fact that Voldemort is just calming having a conversation with a muggle
I’m in love with this gif
i’m in love with the reactions.
About this Image:
This space wallpaper from the NASA/ESA Hubble Space Telescope shows the galaxy cluster MCS J0416.1–2403. This is one of six being studied by the Hubble Frontier Fields programme. This programme seeks to analyse the mass distribution in these huge clusters and to use the gravitational lensing effect of these clusters, to peer even deeper into the distant Universe.
Credit: ESA/Hubble, NASA, HST Frontier Fields
Chandler Bing’s Six Stages of Unemployment
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.
For Me by (Laurence IV)
for the wild heart