When it rains, it pours—but at least there’s a theoretical limit on how big each raindrop can be, even on other planets.
New research published last month in the journal JGR Planets presents calculations of the sizes and shapes of raindrops on planetary bodies beyond Earth, and finds that the constraints on alien rain are pretty similar to those here at home. The researchers found worlds with a stronger gravitational pull had smaller maximum-size raindrops than those with weaker gravity. Air density, on the other hand, doesn’t play a big role in shaping the droplets.
Scientists baked meteorites in an oven to investigate the atmospheres of alien planets | Space
Scientists baked meteorites in an oven and studied the gases they released to investigate the atmospheres of rocky planets.
In a new study, researchers at the University of Calfornia, Santa Cruz took samples of three pristine meteorites that landed at different times and places around the world and baked them in a furnace at 2,192 degrees Fahrenheit (1,200 degrees Celsius). The scientists analyzed the gases that came from minerals in the rocks as they heated up in this "oven."
Exoplanet Types: Worlds Beyond Our Solar System – Exoplanet Exploration: Planets Beyond our Solar
When we describe different types of exoplanets – planets outside our solar system – what do we mean by "hot Jupiters," "warm Neptunes," and "super-Earths"? Since we're still surveying and learning about the variety of worlds out there among the stars, it's sometimes helpful to refer to characteristics they share with planets we're familiar with in our own planetary system.
NASA's Webb to Study Young Exoplanets on the Edge | NASA
Scientists Bake Meteorites to Understand Atmospheres of Rocky Alien Planets | Technology News
The early atmospheres of rocky planets are thought to form from gases released from surface of planet
In a recent study, scientists have taken to baking meteorites to release and analyse gases to have a better understanding of early atmosphere of other rocky planets out there in space. The study has revealed that the initial atmospheres of terrestrial planets may have been significantly different from many of the common assumptions used in theoretical models.
Maggie Thompson, the first author of the study , said the information will come in handy when we start "being able to observe exoplanet atmospheres with new telescopes and advanced instrumentation."
Record-breaking flare erupts from neighboring star - KAKE
A giant flare that is 100 times more powerful than any flare our sun has ever released has erupted from a nearby star, a new study says.
Proxima Centauri is our sun's nearest stellar neighbor at 4 light-years, or 25 trillion miles, away. It's a small, dim red dwarf star with just an eighth of the sun's mass. And it's orbited by at least two planets, one of which may be Earth-like.
The extreme flare was observed by a global team of astronomers on May 1, 2019, and it only lasted for about seven seconds. The team used five telescopes, both ground and space-based, to capture the moment.
Retrograde Season 2021: An Astrologer Says What To Expect | Well+Good
“This is normal, and there’s usually an overlap of retrograde cycles of the social planets—Jupiter and Saturn—and the outer planets—like Neptune and Pluto, and for a little bit, Uranus as well,” says Gailing. “While they all begin and end at different moments, much of the summertime often features these planets all marching backward together. It’s not out of the ordinary. Often, Mercury joins the mix, as it does this year. “
Bad Astronomy | Exoplanet YSES 2b is much farther from its star than expected
Over 4,000 exoplanets — alien planets orbiting other stars — have been found by astronomers so far .
There are a variety of ways to find them, most of which use indirect methods, but one of the coolest is quite direct: Getting actual images of the planets near their host stars. Called direct imaging , this technique has been used to find dozens of planets.
A team of astronomers has targeted 70 nearby stars to look for such exoplanets, and have just announced a new one : YSES 2b, a giant planet orbiting a star just 360 light years away.
A New Super-Earth Detected Orbiting A Red Dwarf Star - SpaceRef
Artistic impression of the super-Earth in orbit round the red dwarf star GJ-740. CREDIT Gabriel Pérez Díaz, SMM (IAC).
In recent years there has been an exhaustive study of red dwarf stars to find exoplanets in orbit around them.
These stars have effective surface temperatures between 2400 and 3700 K (over 2000 degrees cooler than the Sun), and masses between 0.08 and 0.45 solar masses.
The planet orbits its star with a period of 2.4 days and its mass is around 3 times the mass of the Earth. Because the star is so close to the Sun, and the planet so close to the star, this new super-Earth could be the object of future researches with very large diameter telescopes towards the end of this decade. The results of the study were recently published in the journal Astronomy & Astrophysics.
Historic video from Mars shows promise of interplanetary exploration | TheHill
NASA made history earlier this week when its Ingenuity helicopter spun its rotors, ascended into the air and hovered over the surface of Mars for several moments, marking the first ever powered, controlled flight on another planet.
America is changing faster than ever! Add Changing America to your Facebook or Twitter feed to stay on top of the news.
Video of the historic flight captured by the Perseverance rover shows the 4-pound helicopter gear up for its flight, take off, and hover at a height of about 10 feet for about 30 seconds before touching back softly on the martian surface Monday.
Happening on Twitter
*counts the raindrops* 💧💧💧💧💧💧💧💧💧💧💧💧💧 taylornation13 (from Taylor Nation) Tue Apr 20 21:14:38 +0000 2021
Stunning scenery, beautiful cars and a sprinkling of raindrops... An #F1 photographer's dream combination. 💚 AstonMartinF1 (from United Kingdom) Tue Apr 20 15:01:17 +0000 2021
All raindrops may be of roughly the same size, whether they fall as water on Earth, methane rain on Titan, or dropl… https://t.co/JSxr5yW9sr QuantaMagazine Mon Apr 19 20:03:40 +0000 2021
Our solar system boasts a diverse range of planets, but some of them may share a common phenomenon with Earth: rain… https://t.co/is5PTaI4ya CNN Wed Apr 14 04:01:03 +0000 2021
No comments:
Post a Comment