In the brightest region of this glowing nebula called RCW 34, gas is
heated dramatically by young stars and expands through the surrounding
cooler gas. Once the heated hydrogen reaches the borders of the gas
cloud, it bursts outwards into the vacuum like the contents of an
uncorked champagne bottle — this process is referred to as champagne
flow. But the young star-forming region RCW 34 has more to offer than a
few bubbles; there seem to have been multiple episodes of star formation
within the same cloud.
Using NASA’s Hubble Space Telescope, astronomers have captured for the first time snapshots of fledging white dwarf stars beginning their slow-paced, 40-million-year migration from the crowded center of an ancient star cluster to the less populated suburbs.
White dwarfs are the burned-out relics of stars that rapidly lose mass, cool down and shut off their nuclear furnaces. As these glowing carcasses age and shed weight, their orbits begin to expand outward from the star cluster’s packed downtown. This migration is caused by a gravitational tussle among stars inside the cluster. Globular star clusters sort out stars according to their mass, governed by a gravitational billiard ball game where lower mass stars rob momentum from more massive stars. The result is that heavier stars slow down and sink to the cluster’s core, while lighter stars pick up speed and move across the cluster to the edge. This process is known as “mass segregation.” Until these Hubble observations, astronomers had never definitively seen the dynamical conveyor belt in action.
Astronomers used Hubble to watch the white-dwarf exodus in the globular star cluster 47 Tucanae, a dense swarm of hundreds of thousands of stars in our Milky Way galaxy. The cluster resides 16,700 light-years away in the southern constellation Tucana.
NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.
Absolutely amazing painting by Adolph Schaller ‘Anywhere, Anywhen, Anyone’ (circa 1978-79). I wish I had a better copy of it - this is a poor quality scan of it from a tiny magazine photo. It was originally available as a print through Future Life magazine’s mail order 'art club’ in 1979. #space #cosmic #retroart #vintagebooks #astronomy #scifiart #stars #fantasy #trippy #sciencefictionart #sciencefiction #Scifi #alienworlds #galaxy #cosmos
Do you know a site that tells you all of your signs in English BC I've tried finding one and I don't understand what the symbol thingies mean
Astrological symbols? Think of them like the symbols on a periodic table, they aren’t exactly a “language”. There are symbols for each of the signs and planets. Sometimes these symbols are used in astronomy. Here is a little key:
♇ and this symbol:
stand for Pluto.
There are also more symbols for asteroids, Chirons, the nodes, etc.