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☆ Dinosaur-killing asteroid impact fouled Earth's atmosphere with dust
  + stars: | 2023-10-30 | by ( Will Dunham | ) www.reuters.com   time to read: +5 min
The total amount of dust, they calculated, was about 2,000 gigatonnes - exceeding 11 times the weight of Mt. While prior research highlighted two other factors - sulfur released after the impact and soot from the wildfires - this study indicated dust played a larger role than previously known. "It was cold and dark for years," Vrije Universiteit Brussel planetary scientist and study co-author Philippe Claeys said. "While the sulfur stayed about eight to nine years, soot and silicate dust resided in the atmosphere for about 15 years after the impact. "Without the impact, my guess is that mammals - including us - had little chance to become the dominant organisms on this planet."
Persons: grâce, Cem Berk Senel, Philippe Claeys, Özgür Karatekin, Karatekin, Claeys, Will Dunham, Rosalba O'Brien Organizations: Royal Observatory of, Vrije Universiteit Brussel, Nature, Dinos, Thomson Locations: North Dakota, WASHINGTON, Yucatan, Everest, Dakota, Royal Observatory of Belgium, Vrije, Belgium
☆ Asteroid that doomed the dinosaurs halted key process for life on Earth, scientists say
  + stars: | 2023-10-30 | by ( Katie Hunt | ) edition.cnn.com   time to read: +5 min
This dust blocked the sun to an extent that plants were unable to photosynthesize, a biological process critical for life, for almost two years afterward. Pim KaskesAn unexpected killing mechanismTo reach their findings, scientists developed a new computer model to simulate the global climate after the asteroid strike. Fossilized fish found at the site have revealed that the asteroid struck off Mexico’s Yucatán Peninsula in springtime. The team determined that this fine dust could have remained in the atmosphere for up to 15 years after the asteroid strike. The researchers suggested the global climate may have cooled by as much as 15 degrees Celsius.
Persons: ”, Cem Berk Senel, Pim Kaskes, ” Senel, Alfio Alessandro Chiarenza, Chiarenza Organizations: CNN, Royal Observatory of, …, University of Vigo Locations: Mexico, Royal Observatory of Belgium, “, North Dakota, Spain
☆ Images from the Solar Orbiter spacecraft reveal tiny flares shooting from a 'hole' in the sun. They could explain how the sun blasts Earth with charged particles.
  + stars: | 2023-08-26 | by ( Morgan Mcfall-Johnsen | ) www.businessinsider.com   time to read: +5 min
AdvertisementAdvertisementPicoflares could be the source of the solar wind that's blasting EarthAn animation of the solar wind shows particles streaming from the sun towards Earth. That stream, called the "solar wind," gets supercharged when coronal holes or big solar flares are pointed at our planet. Seeing the sun up close, at smaller scales, could reveal its secretsImages from the Solar Orbiter are the closest ever taken of the sun. "Jets, in general, have previously been observed in the solar corona," Chitta, who led the Solar Orbiter study and a team at Max Planck Institute for Solar System Research, told Space.com. NASA/SDONASA and the ESA launched Solar Orbiter in 2020, with a goal of studying these winds at their source.
Persons: Lakshmi Pradeep Chitta, NASA's Parker, Chitta, Space.com, it's, Andrei Zhukov Organizations: Service, Orbiter, Solar Orbiter, NASA Solar Dynamics, NASA, Lights, EUI Team, ESA, CSL, MPS, UCL, Probe, Jets, Solar, Max Planck Institute, Solar System Research, European Space Agency, Royal Observatory of Locations: Wall, Silicon, Royal Observatory of Belgium, Brussels
☆ Sun-observing spacecraft sheds light on the solar wind's origin
  + stars: | 2023-08-24 | by ( Will Dunham | ) www.reuters.com   time to read: +4 min
The sun as seen by the Solar Orbiter spacecraft in extreme ultraviolet light in this mosaic of 25 individual images taken on March 7, 2023, by the high resolution telescope of the Extreme Ultraviolet Imager (EUI) instrument. New observations by the Solar Orbiter spacecraft may provide an answer. "Unlike the wind on Earth that circulates the globe, solar wind is ejected outward into interplanetary space," Chitta said. "Earth and the other planets in the solar system whiz through the solar wind as they orbit around the sun. "This finding is important as it sheds more light on the physical mechanism of the solar wind generation," said solar physicist and study co-author Andrei Zhukov of the Royal Observatory of Belgium.
Persons: Lakshmi Pradeep Chitta, Max Planck, Chitta, Andrei Zhukov, Eugene Parker, Zhukov, Will Dunham, Rosalba O'Brien Organizations: Solar Orbiter, Solar, Max Planck Institute, Solar System Research, European Space Agency, NASA, Orbiter, Royal Observatory of, Thomson Locations: WASHINGTON, Germany, U.S, Royal Observatory of Belgium, American
☆ Solar Orbiter observes jets of material escaping the sun
  + stars: | 2023-08-24 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +6 min
CNN —The Solar Orbiter mission has discovered jets of material rapidly releasing from the sun’s outer atmosphere. An artist's concept shows the Solar Orbiter spacecraft circling the sun. The advanced instruments aboard Solar Orbiter, as well as NASA’s Parker Solar Probe, are helping to unlock the biggest mysteries that remain about the sun. The sun’s magnetic field is so massive that it stretches beyond Pluto, providing a pathway for solar wind to travel directly across the solar system. Solar Orbiter works in tandem with Parker Solar Probe, which is orbiting the sun on a seven-year mission after launching in August 2018.
Persons: “, ”, Lakshmi Pradeep Chitta, Max Planck, NASA’s Parker, Andrei Zhukov, ESA’s Daniel Müller, Parker Organizations: CNN, Orbiter, NASA, European Space Agency, Solar, ESA, Max, Max Planck Institute, Solar System Research, Probe, Space, Royal Observatory of, Solar Orbiter, Parker Locations: Germany, Royal Observatory of Belgium
☆ Mars is rotating more quickly, NASA mission finds
  + stars: | 2023-08-14 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +4 min
CNN —Mars is rotating more quickly than it used to, according to data that NASA’s InSight lander collected on the red planet. Initially, the InSight mission, the first to study the interior of Mars, was supposed to last about two years after it landed in November 2018. The InSight mission continued to collect data about Mars until the very end, falling silent in December 2022 after dust blocked its solar panels from receiving sunlight. Researchers then used RISE to measure the wobble of Mars as the core sloshes around inside it. This new figure was compared with previous estimates of the core’s radius that were collected by tracking seismic waves as they traveled through Mars’ interior.
Persons: CNN —, Viking landers, ”, Sebastien Le Maistre, Mars, “, Bruce Banerdt, “ I’ve Organizations: CNN, NASA, JPL, Caltech, Pathfinder, Space, Space Network, Royal Observatory of, Jet Propulsion Laboratory Locations: Royal Observatory of Belgium, Pasadena , California
☆ Mars is spinning faster and its days are getting shorter — and scientists aren't sure why
  + stars: | 2023-08-09 | by ( Marianne Guenot | ) www.businessinsider.com   time to read: +3 min
Measurements from NASAs' InSight Mars Lander have uncovered a new Martian mystery. The red planet seems to be spinning faster, making its days a little shorter every year. The discovery, made using measurements from NASA's Insight lander, has left scientists baffled. While researchers aren't exactly sure what could be causing this landmass shift, a leading theory suggests it could be down to Martian ice. NASA/JPL-CaltechThe latest findings about Mars are the result of years of data gathered from NASA's Insight Lander over 900 Martian days.
Persons: Mars Lander, Sebastien Le Maistre, Bruce Banerdt, I've Organizations: Service, NASA, Royal Observatory of, JPL, Caltech, Malin, Science Systems, NASA's Insight Lander, Jet Propulsion Laboratory Locations: Wall, Silicon, Royal Observatory of Belgium, Southern California
☆ The sun has produced a record number of sunspots — and it could mean power outages, grounded flights, and beautiful auroras
  + stars: | 2023-07-04 | by ( Marianne Guenot | ) www.businessinsider.com   time to read: +4 min
Scientists are paying close attention to this number because it can help predict if powerful solar flares may cause problems for Earth. Because we're seeing more sunspots than expected, we're likely to see a much stronger solar maximum than had been anticipated. A solar maximum is on its wayThe sun follows a solar cycle, whereby its activity grows and wanes approximately every 11 years. The latest solar cycle was particularly quiet and may have lulled us into a false sense of security, he added. Still, if the sun peaks at 200 sunspots, it will be far from the biggest solar maximum on record.
Persons: —, Auroras, Keith Strong, Mathew Owens, Owens Organizations: Service, Atmospheric Administration, NOAA, NASA, Federal Aviation Administration, Riverton, Twitter, Royal Observatory, University of Reading Locations: North America, Central America, South America, Arizona, Riverton, Belgium
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