Our global human population was estimated to reach 6 billion on today's date in 1999. Eleven years later, in 2011, Earth had gained another billion people. Today - October 12, 2019 - it stands at about 7.7 billion, according to United Nations estimates. Read more.
"The Milky Way is on a collision course with Andromeda in about 4 billion years. So knowing what kind of a monster our galaxy is up against is useful in finding out the Milky Way's ultimate fate." Read more.
Astronomers probed the cosmic web, a large-scale structure composed of massive filaments of galaxies separated by giant voids. They found the filaments also contained significant amounts of gas, believed to help fuel the galaxies’ growth. Read more.
Here in the Northern Hemisphere, because it's autumn now, the ecliptic - or sun and moon's path - makes its narrowest angle with your horizon in early evening. Image via ClassicalAstronomy.com. Read more about this weekend's Hunter's Moon.
When the angle of the ecliptic is narrow, the moon rises noticeably farther north on your horizon from one night to the next. So there's no long period of darkness between sunset and moonrise. In other words, around the time of an autumn full moon, many people see the rising moon ascending in the eastern sky in twilight, for several evenings in a row. The precise time of this full moon is Sunday, October 13, at 21:08 UTC; translate UTC to your time. If you're in the Southern Hemisphere, your evening ecliptic is nearly perpendicular to your early evening horizon now. You'll see the full moon rise in twilight, but the next night's moon come up in darkness, much later at night. Image via ClassicalAstronomy.com. Read more about this weekend's Hunter's Moon.
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