Dreaming About Chasing Rebel Scum
Dreaming about chasing rebel scum
More Posts from Pugmum1 and Others
Views of Pluto Through the Years
July 15, 2015.
Credit: NASA’s Website
Davy Jones from The Monkees 💘💘💘 I love him so much // The 60s😍🔥
Air New Zealand made a flight safety video that was a gigantic ode to Men In Black, complete with aliens, Frank the Dog and Zed.
Omg, I could certainly use this some mornings! 😂👍 "YouTuber Simone Giertz built the most efficient alarm clock in the world: it actually slaps you awake."
Comets have two tails.
There are two types of comet tails: dust and gas ion.
A dust tail contains small, solid particles that are about the same size found in cigarette smoke. This tail forms because sunlight pushes on these small particles, gently shoving them away from the comet’s nucleus. Because the pressure from sunlight is relatively weak, the dust particles end up forming a diffuse, curved tail.
A gas ion tail forms when ultraviolet sunlight rips one or more electrons from gas atoms in the coma, making them into ions (a process called ionization). The solar wind then carries these ions straight outward away from the Sun. The resulting tail is straighter and narrower. Both types of tails may extend millions of kilometers into space. As a comet heads away from the Sun, its tail dissipates, its coma disappears, and the matter contained in its nucleus freezes into a rock-like material.
Comets don’t like the sun.
Comets lose a lot of mass when they go by the Sun. A lot: some shed hundreds of tons of material per second. That’s actually a small fraction of the mass of a comet, but given time, and lots of solar passes, it adds up. Every comet we see is slowly dissolving in space. Eventually even the mighty Comet Halley will be gone, broken down into a swarm of rocks, gravel, and dust once its gas is gone.
A koala chases a South Australian woman on a quad bike, then attaches itself to the wheel. Courtesy Ebony Churchill/Facebook.
Beautiful island universe Messier 94 lies a mere 15 million light-years distant. A popular target for earth-based astronomers, the face-on spiral galaxy is about 30,000 light-years across, with spiral arms sweeping through the outskirts of its broad disk. But this Hubble field of view spans about 7,000 light-years or so across M94’s central region. The sharp close-up examines the galaxy’s compact, bright nucleus and prominent inner dust lanes, surrounded by a remarkable bluish ring of young, massive stars. The massive stars in the ring are all likely less than 10 million years old, indicating the galaxy experienced a well-defined era of rapid star formation. As a result, while the small, bright nucleus is typical of the Seyfert class of active galaxies, M94 is also known as a starburst galaxy. Because M94 is relatively nearby, astronomers can explore in detail reasons for the galaxy’s burst of star formation.
Image Credit: ESA/Hubble and NASA
