Quote from: Blackstar on 08/29/2024 05:32 pmQuote from: catdlr on 08/29/2024 04:51 pmA Dazzling Comet is Heading Our Way! It Will Outshine Brightest StarsYou left off "We're doomed."It's not hitting us; it's a comet.
Quote from: catdlr on 08/29/2024 04:51 pmA Dazzling Comet is Heading Our Way! It Will Outshine Brightest StarsYou left off "We're doomed."
A Dazzling Comet is Heading Our Way! It Will Outshine Brightest Stars
Quote from: catdlr on 08/29/2024 05:35 pmQuote from: Blackstar on 08/29/2024 05:32 pmQuote from: catdlr on 08/29/2024 04:51 pmA Dazzling Comet is Heading Our Way! It Will Outshine Brightest StarsYou left off "We're doomed."It's not hitting us; it's a comet.Tell that to comet Shoemaker Levy 9.
Rocky debris blasted away from the tiny asteroid Dimorphos when NASA’s DART spacecraft intentionally slammed into it in 2022 could create the first human-made meteor shower known as the Dimorphids, new study has found.
People have observed the bright Martian poles wax and wane for centuries, but only within the last 50 years have scientists discovered that they are mostly comprised of carbon dioxide cycling in and out of the atmosphere to the rhythm of the seasons. But exactly how this happens is a complex interplay of planetary processes that scientists are continually teasing out.
I led newly published research aimed at addressing this puzzle by simulating the intense solar heating that Phaethon experiences during its perihelion.We used chips from a rare group of meteorites called the CM chondrites, which contain clays that are believed to be similar to Phaethon’s composition. These were heated in an oxygen-free environment multiple times, simulating the hot-cold/day-night cycles that occur on Phaethon when it is close to the Sun.The results were surprising. Unlike other volatile substances that would typically be lost after a few heating cycles, the small quantities of sulphurous gases contained in the meteorites were released slowly, over many cycles.
UPDATE: We expect the ~1 m asteroid discovered this morning to strike Earth's atmosphere over the Philippines near Luzon Island at 16:46 UTC today. However the nearby tropical storm Yagi/Enteng will make fireball observations difficult.
Survey observations using the Subaru Telescope's ultra-widefield prime focus camera have revealed that there may be a population of small bodies further out in the Kuiper Belt waiting to be discovered.
"The most exciting part of the HSC observations was the discovery of 11 objects at distances beyond the known Kuiper Belt," says team member Dr. Fumi Yoshida, from the University of Occupational and Environmental Health Sciences and the Planetary Exploration Research Center, Chiba Institute of Technology.Many of the objects discovered with HSC are located at distances of 30–55 astronomical units (au) from the sun (1 au corresponds to the distance between the sun and Earth) and are thought to be within the known Kuiper Belt.On the other hand, the team was not expecting what appears to be a cluster of objects in the 70–90 au region and a valley between 55 au and 70 au (where only a small number of objects are distributed, see figure below). Such a valley had not been reported in other observations.
An international team of astronomers, including scientists from the University of Geneva (UNIGE) and the PlanetS National Center of Competence in Research, has identified the presence of iron winds in the atmosphere of the ultra-hot Jupiter WASP-76 b.
For this new study, the team of astronomers focused on the day side of WASP-76 b, which has a temperature of 2400 degrees Celsius, by observing it at high spectral resolution in the visible light. The main result was the detection of a stream of iron atoms moving from the lower to the upper layers of the planet's atmosphere.
But in a new paper published today in Nature, MIT Kerr-McGee Career Development Professor Richard Teague and his colleagues report evidence that the movement of the gas surrounding the star AB Aurigae behaves as one would expect in a gravitationally unstable disk, matching numerical predictions.Their finding is akin to detecting the snowplow that made the pile. This indicates that gravitational collapse is a viable method of planetary formation. Here, Teague, who studies the formation of planetary systems in MIT's Department of Earth, Atmospheric and Planetary Sciences (EAPS), answers a few questions about the new work.
"Scientists don't care," which is not what his own video says. It's clickbait like that that undercuts YouTuber credibility.
New evidence suggests that billions of years ago, a star may have passed very close to our solar system. As a result, thousands of smaller celestial bodies in the outer solar system outside Neptune's orbit were deflected into highly inclined trajectories around the sun. It is possible that some of them were captured by the planets Jupiter and Saturn as moons.
"The best match for today's outer solar systemthat we found with our simulations is a star that was slightly lighter than our sun—about 0.8 solar masses," explains Pfalzner's colleague Amith Govind. "This star flew past our sun at a distance of around 16.5 billion kilometers. That's about 110 times the distance between Earth and the sun, a little less than four times the distance of the outermost planet Neptune."
”Some of these objects could have been captured by the giant planets as moons," says Simon Portegies Zwart from Leiden University. "This would explain why the outer planets of our solar system have two different types of moons."
