From Chandra - “Gravitational lensing by an intervening elliptical galaxy has created four different images of the quasar, shown by the Chandra data in pink. Such lensing, first predicted by Einstein, offers a rare opportunity to study regions close to the black hole in distant quasars, by acting as a natural telescope and magnifying the light from these sources.”
The Aurora Borealis might be visible to the northern United States tonight. See this Denver Post article for more info. The image above is CC-BY-SA from Andi Gentsch.
This is dimethylsulfoxide:
Diethyl Ether C4H10O
- Appearance: Colorless liquid
- Molar Mass: 74.12 g/mol
- Density: 0.7132 g/cm3
- Melting Point: -116.4°C
- Boiling Point: 34.6°C
- pKa: -3.5 (conjugate acid)
Diethyl ether, also known as just “Ether”, is a flammable, volatile liquid used primarily as a solvent. It also has uses as a general anesthetic with narcotic properties but it’s use has been discontinued for safer, halogenated anesthetics. It has a major drawback of causing psychoactive addiction, called etheromania.
Another engineer’s guide to cats. It is funny.
Christmas Collider - Digital Science. Found via Boing Boing. Now, I want to build my own particle collider.