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Tag: Collision

Collision that formed the moon also brought Earth water, planetary scientists claim

Collision that formed the moon also brought Earth water, planetary scientists claim

Science
May 21 (UPI) -- Without the moon and water, life on Earth wouldn't be possible. New research out of Germany suggests both were delivered by Theia, which collided with Earth 4.4 billion years ago. Scientists have long puzzled over the origins of Earth's water. Earth was formed in the inner solar system, and the inner solar system was dry. The solar system's wet materials were relegated to the outer solar system. Water-rich carbonaceous meteorites, for example, hail from the outer solar system. Non-carbonaceous meteorites from the inner solar system are without water. At some point during Earth's early history, carbonaceous materials delivered large quantities of water. But the details and timing of this delivery process aren't well understood. "We have used molybdenum isotopes to answer ...
Ancient lunar collision explains the moon’s two faces

Ancient lunar collision explains the moon’s two faces

Science
May 20 (UPI) -- The moon has two faces -- the smoother, Earth-facing side and the rougher side, the dark side of the moon, which is marred by thousands of craters. Now, scientists know why the moon's hemispheres are so different. According to a new study, an ancient collision between a dwarf planet and the moon left half the lunar surface permanently scarred. Scientists have previously suggested Earth hosted two moons that merged billions of years ago. Planetary scientists have also previously floated the possibility of a collision between a dwarf planet and the moon. If the moon did crash into a dwarf planet during the solar system's earliest days, the structure of the moon's crust should reveal the signature of such a collision. Researchers were able to locate such a signature using s...
Neutron star collision 4.6 billion years ago sent gold, platinum to Earth

Neutron star collision 4.6 billion years ago sent gold, platinum to Earth

Science
May 3 (UPI) -- Two neutron stars collided 4.6 billion years ago near the Earth's solar system, sending the planet some fraction of its most precious metals, a new study says. The cosmic episode provided Earth with about 0.3 percent of its gold, platinum and uranium, according to research published Wednesday in Nature. "This means that in each of us we would find an eyelash worth of these elements, mostly in the form of iodine, which is essential to life," Imre Bartos, a researcher at the University of Florida and study author, said in a news release. "A wedding ring, which expresses a deep human connection, is also a connection to our cosmic past predating humanity and the formation of Earth itself, with about 10 milligrams of it likely having formed 4.6 billion years ago." To come up wi...
Tiger Woods roars into Masters contention despite bizarre security guard collision

Tiger Woods roars into Masters contention despite bizarre security guard collision

Sports
Media playback is not supported on this device Masters second-round leaderboard-7: F Molinari (Ita), J Day (Aus), B Koepka (US), A Scott (Aus), L Oosthuizen (SA); -6: D Johnson (US), J Harding (SA), T Woods (US), X Schauffele (US); -5: I Poulter (Eng), J Rahm (Spa)Selected others: -4 P Mickelson (US); -3: B DeChambeau (US), R Fowler (US); -2: T Fleetwood (Eng); -1: J Spieth (US), B Langer (Ger), P Reed (US); Level: R McIlroy (NI); +2: T Hatton (Eng); +3: E Pepperell (Eng) Full leaderboardTiger Woods is in contention to win a first major since 2008 despite almost being injured in a bizarr...
Astronomers use Gaia data to model Milky Way-Andromeda collision

Astronomers use Gaia data to model Milky Way-Andromeda collision

Science
Feb. 8 (UPI) -- Scientists have long suspected that the Milky Way and Andromeda galaxies are on a collision course, but now, thanks to new data from the European Space Agency's Gaia satellite, researchers finally know how fast and at what angles the two galactic bodies are approaching impact. The Milky Way and Andromeda, along with the smaller Triangulum, are the three biggest galaxies in the Local Group, a collection of more than 54 galaxies -- most of them dwarf galaxies. While scientists think all 54 members are organized by their gravitational influence on one another, the positioning and trajectories of Local Group members isn't well understood. "We needed to explore the galaxies' motions in 3D to uncover how they have grown and evolved, and what creates and influences their features...