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☆ Unusual world offers astronomers a glimpse into how planets become ‘hot Jupiters’
  + stars: | 2024-07-17 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +9 min
The star is one of a binary pair, so the planet orbits the primary star, while the primary star orbits a secondary star. While Jupiter takes 4,000 Earth days to complete one orbit around the sun, hot Jupiters complete one orbit every few days. Astronomers use “eccentric” to refer to the shape of a planet’s orbit on a scale from zero to 1. “It’s a pretty extreme process in that the changes to the planet’s orbit are massive,” Millholland said. Discovering a second hot Jupiter precursor is helping astronomers to confirm the idea that high-mass gas giants transform into hot Jupiters as they migrate from eccentric to circular orbits, the researchers said.
Persons: —, ”, Arvind Gupta, NOIRLab, Gupta, Suvrath Mahadevan, Verne, Willaman, Jason Wright, ” Wright, ” Gupta, Sarah Millholland, “, ” Millholland, Wright, James Webb Organizations: CNN —, Penn State, Astronomy, Mercury, NASA, Massachusetts Institute, Technology’s Kavli, for Astrophysics, Space Research, chrysalis Locations: Kitt, Arizona
☆ Webb space telescope spots oldest ‘dead’ galaxy
  + stars: | 2024-03-06 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +4 min
CNN —Astronomers have spotted the oldest “dead” galaxy ever observed while studying the cosmos with the James Webb Space Telescope, and it’s one of the deepest views into the distant universe made with the observatory to date. The galaxy existed when the universe was only about 700 million years into its current age of about 13.8 billion years. But something made the galaxy suddenly halt star formation almost as quickly as star birth had begun more than 13 billion years ago, and the researchers have yet to uncover the cause. Studying the galaxy could reveal new insights about the early universe and the factors that affect star formation within galaxies, according to the authors. “Until now, to understand the early universe, we’ve used models based on the modern universe.
Persons: James Webb, “, ”, Tobias, Francesco D’Eugenio, “ We’re, Webb, Roberto Maiolino, Maiolino, ” D’Eugenio, — Organizations: CNN —, Telescope, University of Cambridge’s Kavli, Cosmology, Kavli, Cavendish Laboratory, University of Cambridge
☆ With a gulp and burp, a bloated star swallows a Jupiter-sized planet
  + stars: | 2023-05-03 | by ( Will Dunham | ) www.reuters.com   time to read: +4 min
As the star grew, its surface reached the orbit of the doomed planet, with mayhem ensuing. Red giant stars can swell to a hundred times their original diameter, engulfing any planets in their way. This planet, perhaps a few times bigger than Jupiter, orbited its star in less than a day at a distance closer than Mercury, our innermost planet, orbits the sun. Even before it is engulfed whole, our data provides evidence that the planet tries to rip out the star's surface layers with its own gravity. But the star happens to be a thousand times more massive so the planet can't do much and eventually makes the plunge," De said.
☆ Astronomers spot a sneak peek of Earth's death — a star swallowing a planet whole — for the first time
  + stars: | 2023-05-03 | by ( Morgan Mcfall-Johnsen | ) www.businessinsider.com   time to read: +7 min
Astronomers discovered a distant star swallowing a planet for the first time ever. Swallowing the planet whole produced a burst of energy that expelled the star's outer layers, causing it to expand and brighten rapidly. Except for a veneer of dust, the star pretty much looked the same as it had before, one year after devouring its planet. The distant planet that just got absorbed by its star was about the size of Jupiter, which is more than 1,300 Earths. (It later turned out, this pre-eruption dust was material from the planet skimming the atmosphere of the star as it orbited closer and closer.)
☆ Construction leaders are using technology to help push the boundaries of possibility
  + stars: | 2023-03-23 | by ( Sponsor Post | Created Insider Studios With Lenovo | ) www.businessinsider.com   time to read: +7 min
Leading construction company Laing O'Rourke has been at the cutting edge of building innovation for decades. Construction company Laing O'Rourke is delivering some of the world's most complex and challenging building and infrastructure projects. Leading construction innovationFor decades, Laing O'Rourke has invested in technology and innovation. Lenovo's technology was a critical enabler for many of the Laing O'Rourke projects above. To this end, Laing O'Rourke has also invested in Lenovo's ThinkReality and Mirage headsets.
☆ AT 2022cmc: Rare cosmic event beamed light at Earth from 8.5 billion light-years away
  + stars: | 2022-11-30 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +5 min
But the rare cosmic event actually occurred 8.5 billion light years away from Earth, when the universe was just a third of its current age — and it has created more questions than answers. This graphic shows how a tidal disruption event might look in space. Carl Knox/OzGrav/Swinburne University of TechnologyWhen a star is torn apart by a black hole’s gravitational tidal forces, it’s known as a tidal disruption event. Observing more events like this could reveal how black holes launch such powerful jets across space, according to the researchers. “Scientists can use AT 2022cmc as a model for what to look for and find more disruptive events from distant black holes.”
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