The matter between the stars in a galaxy—called the interstellar medium—consists not only of gas, but also of a great deal of dust. At some point in time, stars and planets originated in such an environment, because the dust particles can clump together and merge into celestial bodies. Important chemical processes also take place on these particles, from which complex organic—possibly…
Tag: molecules
Giant ‘survivor’ planet found orbiting dead star
For the first time, astronomers have detected a planet orbiting a white dwarf star. If further confirmed, the discovery shows that some planets could survive the destruction of their sun-like stars, and some might even remain potentially habitable. Source: https://earthsky.org/space/survivor-planet-wd-1856-b-orbiting-white-dwarf…
Hints of life on Venus: Scientists detect phosphine molecules in high cloud decks
An international team of astronomers, led by Professor Jane Greaves of Cardiff University, today announced the discovery of a rare molecule—phosphine—in the clouds of Venus. On Earth, this gas is only made industrially, or by microbes that thrive in oxygen-free environments. Source: https://phys.org/news/2020-09-hints-life-venus-scientists-phosphine.html…
Has microbial life been found on Venus?
Is there microbial life in the atmosphere of Earth’s closest neighbor, Venus? An international team of astronomers has found tentative but highly compelling evidence. Source: https://earthsky.org/space/life-on-venus-phosphine-biosignatures…
The evolving chemistry of protoplanetary disks
Planets form from the gas and dust in disks that surround young stars. Chemicals in the disk that evaporate easily, called volatiles, include important molecules like water, carbon monoxide, nitrogen, as well as other simple organic molecules. The amount of volatile material that accumulates in a planet as it forms is a key factor in determining the planet’s atmosphere and suitability…
Why are skies so red over the U.S. West this week?
Perhaps you’ve seen the photos of the eerie red skies over San Francisco and other cities in the U.S. West this week as massive ongoing wildfires rage. But why red exactly? Source: https://earthsky.org/earth/why-skies-look-red-when-there-are-wildfires…
More Covid-19 Reinfections Found, But Researchers Urge Caution
That Covid-19 reinfection in Hong Kong was followed by similar reports in Belgium and the Netherlands. It was announced today that a 27-year-old woman in Karnataka, India also tested positive for the disease a second time (though the government is still seeking confirmation), and now researchers in Nevada are also reporting a “likely” case of reinfection. The health-news site Stat reports:…
What are brown dwarfs?
A brown dwarf is more massive than a planet, but less massive than a star. Exactly how much more and less? Source: https://earthsky.org/space/definition-what-are-brown-dwarfs…
Physicists nudge atoms within less than a trillionth of a second
Scientists from Regensburg and Zurich have found a fascinating way to push an atom with controlled forces so quickly that they can choreograph the motion of a single molecule within less than a trillionth of a second. The extremely sharp needle of their unique ultrafast microscope serves as the technical basis: It carefully scans molecules, similar to a record player. Physicists…
Engineers Have Figured Out How To Make Interactive Paper
An anonymous reader quotes a report from Gizmodo: Engineers at Purdue University have created a printing process by which you can coat paper or cardboard with “highly fluorinated molecules.” This then makes the coated paper dust, oil, and water-repellent, meaning you can then print multiple circuit layers onto the paper without smudging the ink. According to a paper the engineers published…