Sunday, February 26, 2017

An amazing space fact.

quasar named 3C 273 is four trillion times brighter than the sun. it would have about the same brightness in the sky as our sun at a distance of ~33 light years. this one quasar emits approximately as much light as the entire milky way galaxy combined x100.

Here it is below photographed by the Hubble Telescope.

Quasars are formed when enormous amounts of gas orbit a supermassive black hole. The intense gravity of the black hole makes the gas orbit at insane speeds. And the gas becomes incredibly hot as a result. And because of the size of supermassive black holes, the superheated gascloud is larger than our whole solar system.
The orbiting gas also creates incredibly powerful jets of radiation that shoot out from the poles of the black hole's event horizon. The exact mechanism that causes this is still not known, but if the jets are pointed in our direction the quasars will appear even brighter.
Gravity is so huge around a black hole that it creates different orbiting speeds in the disk of gas orbiting it (because of the fact that the importance of distance is magnified in gravity's formula). The result of this is an incredible amount of particle collisions and therefore very high temperatures.
Any planets within ~33 light years of this quasar would be eternally as bright as daytime on Earth. They would also be bathed in powerful X-rays given off by the Quasar. It would not be possible to live there.

Machrie Moor Stone Circles & Standing Stones, Arran, Scotland

Machrie Moor Stone Circles is the collective name for six stone circles visible on Machrie Moor near the settlement of Machrie on the Isle of Arran. Six stone circles are visible on the moor immediately east of the derelict Moss Farm. Some circles are formed of granite boulders, while others are built of tall red sandstone pillars. The moor is covered with other prehistoric remains, including standing stones, burial cairns and cists. The stone circles are positioned over previous timber circles. A radiocarbon date of 2030 ± 180 BC has been found for the timber circle at Machrie Moor 1. Several hut circles can also be seen as low rings of turf-covered stone. The six stone circles are situated below a prominent notch on the skyline to the northeast where Machrie Glen divides into two steep-sided valleys. At the summer solstice the notch is intersected by the sun at sunrise, and this may explain why the circles were sited in this location. 

                                         The first circle was built around 3500 BC.

“Rafting on the Missouri” – art by John Stobart

Is my rump too big?

Hickam AFB, Hawaii

Your good news of the day

8 animals that are no longer endangered.

Chuck Yeager is probably in there.

The Art of Speed