Astronomers have detected more extremely energetic cosmic particles coming from one side of the sky than the other. The post Some Cosmic Rays Come from Outside the Galaxy appeared first on Sky & Telescope.
Super Massive Black Holes by PHD Comics. Sagittarius A*, the super massive black hole at the center of the Milky Way, has a mass million times the mass of our sun, and a diameter equal to the distance between the sun and Mercury.
Space Garbage by NASA Orbital Debris Program: After decades of space exploration, there are now more than pieces of artificial debris greater than half an inch in size. We seriously need a GIANT space vacuum.
The Universe Is Expanding Faster Than Scientists Thought. Illustration showing the three steps astronomers used to measure the universe's expansion rate to an unprecedented accuracy, reducing the total uncertainty to percent.
The Horsehead Nebula is a cloud of ionized-hydrogen in the constellation Orion. These clouds are lit from within by young, hot stars. The interstellar dust absorbs the light from part of the ionized cloud creating this beautiful contrast. Image Credit: NA
The Sword Of Orion ~ The Orion constellation is noticeable for three medium-bright stars in a short, straight row. These stars represent Orion’s Belt. If you look closely, you’ll notice a curved line of stars “hanging” from the three Belt stars.
The Comet Jacques ( 70 million km away), and the Heart & Soul Nebulae light years away) team up to drop some cosmic perspective. Image Credit: Michael Jaeger / Astronomy Picture of the Day (APOD) 1 light year: trillion kilometers