Scientists may have figured out how dust particles can stick together to form planets, according to a Rutgers co-authored study that may also help to improve industrial processes.
In homes, adhesion on contact can cause fine particles to form dust bunnies. Similarly in outer space, adhesion causes dust particles to stick together. Large particles, however, can combine due to gravity -- an essential process in forming asteroids and planets. But between these two extremes, how aggregates grow has largely been a mystery until now.
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White dwarf star spotted nibbling on the atmosphere of a nearby icy planet | Popular Science
Scientists figure out how accumulating dust particles become planets - UPI.com
Dec. 9 (UPI) -- Scientists have developed a working theory for how small clumps of dust become big balls of debris and begin to form young planets.
In protoplanetary disks, adhesion causes small particles of dust to stick together, just as it causes dust bunnies to form underneath furniture at home. Gravity causes larger objects to coalesce. But until now, scientists weren't exactly sure how small clumps of dust become large orbs of debris.
New research, published this week in the journal Nature Physics , suggests particles under microgravity conditions develop strong electrical changes causing them to spontaneously stick together.
Give Up Pets to Save the Planet! | National Review
The animal rights movement wants to ban human ownership of any and all animals — including your beloved pets — although that is rarely advertised since it would cost AR groups donations from misguided pet lovers who conflate animal welfare organizations with those supporting “liberation.”
Pet ownership also imposes wider environmental costs. Added together, all the cats and dogs in the US consume the same amount of energy as 60 million people, effectively increasing the population by a fifth.
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Our Weird Orderly Solar System, Planets Like XO7 b Show Us How Weird We Are. | Science 2.0
O ur bizarre solar system has no hot Jupiter. XO-7 b is a hot Jupiter which orbits its star once roughly every 3 days (1). Of all the solar systems in the heavens ours seems to be most unusual. Our solar system has orderly circular orbits, with rocky planets near the Sun, and gassy icy planets farther out. That order and stability seems to be the exception not the rule. Humanity has now observed numerous solar systems and found one type to be very common.
We finally know how whole planets grow from tiny clumps of dust | New Scientist
Electricity may be more important to making planets than we thought. We aren’t sure how tiny particles come together to build baby planets, but dropping glass beads from the top of a tall tower has shown that it may be with some help from static electricity.
The very first seeds of planets are made of micrometre-sized grains of dust, which bump into one another as they orbit a star and stick together in fluffy clumps. As more and more tiny grains stick together, the clumps start to compact, until they are no longer fluffy and start to bounce off one another like billiard balls instead of sticking. This happens when the clumps are millimetres across and is called the bouncing barrier.
Venus & Saturn Conjunction December 2019: See Planets Touch in the Sky - Thrillist
Santa isn't the only reason you should be looking toward the sky in December. There are a couple of notable meteor showers, as well as some close encounters between the planets.
This week, Venus and Saturn will almost touch in the night sky. Of course, they won't really touch. They'll still be hundreds of millions of miles apart, but from the vantage point of Earth, they'll look like they're getting cozy among the stars.
From December 9-13, they will approach each other shortly after sunset in the southwest sky. They'll be fairly low, so you'll need an unobstructed view of the southwest sky to get a good look at the two planets.
North American Birds Are Shrinking As The Planet Warms
Almost 40 years of data reveal that, thanks to climate change, North America's migratory birds are shrinking whilst their wings are growing longer – effects that may be occurring all around the world
A recently published study reveals that migratory birds in North America are shrinking, thanks to warming temperatures caused by climate change. In addition to losing body weight, the birds' legs are growing shorter whilst their wings are growing longer.
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How planets may form after dust sticks together @RutgersU @NaturePhysics https://t.co/9o7NQWHXdW physorg_com Mon Dec 09 17:01:01 +0000 2019
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