Four-hundred fifty light-years from Earth, a young star is glowing at the center of a system of concentric rings made from gas and dust, and it is producing planets, one for each gap in the ring.
Its discovery has shaken solar system origin theories to their core. Mayer Humi, a scientist from the Worcester Polytechnic Institute, believes it provides an apt study target for theories about protoplanetary rings around stars. The research is published in the Journal of Mathematical Physics , by AIP Publishing.
And here's another article:
Announcement About Research on Venus's Chemistry – NASA Solar System Exploration
Features in the Venus's thick cloud cover visible in greater detail. The clouds seen here are located about 40 miles (60 kilometers) above the planet's surface, at altitudes where Earth-like atmospheric pressures and temperatures exist. They are comprised of sulfuric acid particles, as opposed to water droplets or ice crystals, as on Earth. Credit: NASA/JPL-Caltech | › Full image and caption
A paper about chemistry on Venus was published today in Nature Astronomy. NASA was not involved in the research and cannot comment directly on the findings; however, we trust in the scientific peer review process and look forward to the robust discussion that will follow its publication.
Sunrises Across the Solar System - Universe Today
Scientists have learned a lot about the atmospheres on various worlds in our Solar System simply from planetary sunrises or sunsets. Sunlight streaming through the haze of an atmosphere can be separated into its component colors to create spectra, just as prisms do with sunlight. From the spectra, astronomers can interpret the measurements of light to reveal the chemical makeup of an atmosphere.
At sunrises and sunsets, the Sun's rays stream through a thicker layer of the atmosphere at an oblique angle, providing more details and data – and sometimes a burst of color from the scattering of light, called Rayleigh scattering.
COVID-19 Dreams, Synchronicity and Visitors from Another Solar System - Scientific American
Have you been sleeping well this year? If not, you're not alone. Nightmares about COVID-19—fears of being in crowded spaces, touching germy surfaces, feeling exposed without a mask—have been disturbing the sleep of people around the world. The pandemic seems to have introduced a new shared unreality, with dreams that are as alarming as that one about being late for a final exam you haven't studied for.
When a bizarre object zipped through our solar system in late 2017, astronomers quickly realized it was from out of this world. ‘Oumuamua is the first object from another solar system to be detected in ours. We call it an object because nobody really knows what it is—it's kind of comet-ey, kind of asteroid-ey, and according to a few theorists, it's not entirely unlike an alien ship. (In general, whenever somebody says, “Maybe it's aliens,” it's never aliens.
This may worth something:
Meteorites bring information about the early solar system - The Science Show - ABC Radio National
Meteorites are often the size of a grape or an apple when they hit the Earth's surface, but they bring with them a large amount of information about the early days of the solar system. This explains why scientists are so keen to find them. The Desert Fireball Network based at Curtin University is a group of scientists dedicated to tracking and recovering meteorites.
* * *
Speaker
Ellie Sansom
Researcher in Planetary Science
Space Science and Technology Centre
Curtin University
Perth WA
Manager of The Australian Desert Fireball Network and Global Fireball Observatory
Meteorites Show Transport of Material in Early Solar System | UC Davis
How Scientists Around the World Track the Solar Cycle | NASA
Meteorite study calls into doubt a popular theory about the early solar system
"Meteorites provide us with the earliest history of ourselves," said Professor Yuji Sano from the Atmosphere and Ocean Research Institute at the University of Tokyo. "This is what fascinated me about them. By studying properties, such as radioactive decay products, of meteorites that fell to Earth, we can deduce when they came and where they came from. For this study we examined meteorites that came from Vesta, the second-largest asteroid after the dwarf planet Ceres."
Sano and his team found evidence that Vesta was hit by multiple impacting bodies around 4.4 billion to 4.15 billion years ago. This is earlier than 3.9 billion years ago, which is when the late heavy bombardment (LHB) is thought to have occurred. Current evidence for the LHB comes from lunar rocks collected during the Apollo moon missions of the 1970s, as well as other sources.
Happening on Twitter
The Voyager spacecraft just passed 14 billion miles from Earth! Extraordinary. Now think of this: it took Voyager 4… https://t.co/jp0deczv7Z EricWhitacre (from California, USA) Fri Sep 18 06:21:50 +0000 2020
No comments:
Post a Comment