In a word, “yes.” Space is packed with gravity. Hank Green explains how gravity works, first described by Isaac Newton, and why even though it seems that things are floating in space, they’re still affected by gravity. Every object in the universe is constantly attracting every other object in the universe.
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Astronomers say they may have spotted a possible planet in the dramatic and violent process of being born, an event that may shed light on how large, gaseous planets come into being. The Wall Street Journal‘s Gautam Naik reports.
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It has NO EDGE. And NO CENTER… or does it? MinutePhysics brings us up-to-date on the latest scientific thoughts regarding the physical dimensions and boundaries of the Universe.
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A new study using observations from NASA’s Fermi Gamma-ray Space Telescope reveals the first clear-cut evidence that the expanding debris of exploded stars produces some of the fastest-moving matter in the universe. This discovery is a major step toward meeting one of Fermi’s primary mission goals. H/T SpaceRip
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minutephysics often tackles the big scientific issues. This episode tackles perhaps the biggest question out there — What is the Universe?
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Australian astronomer and popular scientist Fred Watson explains the significance behind Russia’s rare meteor strike and the Earth’s close encounter with an asteroid happening so close together. He says the incidents highlight the need for early warning systems so such celestial bodies can be detected and, if possible, deflected before they strike the Earth. H/T WorldNewsAustralia
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Calling Bruce Willis.
This coming Friday, a 130,000-ton asteroid is set to pass perilously close to Earth. NASA has been tracking the asteroid and believes it won’t strike the planet. But what if NASA is wrong about this projectile, known as 2012 DA14? Robert Lee Hotz from The Wall Street Journal runs down what you need to know.
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Meanwhile, new evidence has emerged that another asteroid — although a much larger one — wiped out the dinosaurs. More from Newsy Science.
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Astronomers are beginning to unravel the secrets of Messier 106, a nearby galaxy marked by a ravenous black hole at its core and mysterious gaseous arms that spiral outward.
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Astronaut Jerry Carr knows space. As commander of Skylab, he spent more than 2,000 hours in space, orbiting the Earth over 1,000 times. Recounting his life story, Carr remembers the enchanting years he spent at NASA in an animated video from TEDEducation.
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How many stars are there in the universe? This question leads Hank Green to a couple other questions. How many stars can we see from Earth? How many stars are there in our galaxy? He addresses these questions in SciShow, but the answer to the original question proves elusive.
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