Why isn’t there an endless variety of planet sizes in the universe? Why are most planets like those in our solar system: small and rocky, or big and gaseous?
Artist’s concept of a planet-forming disk made from rock and gas surrounding a young star. Image via NASA/JPL-Caltech / SwRI/ MSSS/ Gerald Eichstädt/ Seán Doran.
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Scientists have discovered over 4,000 exoplanets outside of our solar system, according to NASA's Exoplanet Archive .
And here's another article:
Is there a 2nd planet orbiting Proxima Centauri? | Space | EarthSky
Proxima Centauri, the closest star to our sun, may have a second planet, according to researchers from the National Institute of Astrophysics. If confirmed, it would be an ideal candidate for direct imaging by new upcoming space telescopes.
Artist’s concept of Proxima Centauri b, an Earth-sized exoplanet orbiting the nearest star to our sun, Proxima Centauri. Now researchers think there is a second, larger planet also orbiting the star. Image via ESO/ M. Kornmesser/ Wikipedia .
Watch Venus Meet Neptune In Tonight's Sky, Your Best Chance To See Our Outermost Planet Until 2022
Neptune is typically a faint blue object easily missed through a telescope or binoculars. But during ... [+] a conjunction, where there's a very close reference object, it's easier to spot than at any other time of the year, as shown during this 2014 conjunction of Venus and Neptune.
With eight planets orbiting our Sun, any two will eventually appear close together from our perspective.
The eight planets of our Solar System and our Sun, to scale in size but not in terms of orbital ... [+] distances. Note that these are the only eight objects that meet all three of the planetary criteria as set forth by the IAU, and that they orbit around the Sun within just a few degrees of the same plane as one another..
Union High School Grad Helps NASA Discover New Earth-Like Planet | TAPinto
UNION, NJ – A graduate of Union High School, an astronomer at the Smithsonian Astrophysical Observatory, was among scientists who helped NASA find the first exoplanet, about 100 light years away that looks a lot like Earth.
Dr. Joey Rodriguez, a 2006 Union High School graduate, led a team that has discovered an Earth-size planet in its star’s habitable zone, the range where conditions may be just right to allow the presence of liquid water on the surface. Scientists confirmed the find, called TOI 700 d, and have said it’s one of only a few Earth-size planets discovered in a star's habitable zone so far.
While you're here, how about this:
Planet Formation Around M Dwarfs via Disc Instability: Fragmentation Conditions and Protoplanet
Properties of the observed exoplanets around M dwarfs compared with the properties of all observed exoplanets. Red: companions (exoplanets and brown dwarfs up to 60 MJ) with MP > 1 MJ around M dwarfs (M? 1 MJ around higher mass stars (M? > 0.5 M ). Green: exoplanets with MP 0.5 M ). Brown: companions around brown dwarfs (M? < 0.08 M ). Data taken from https://exoplanet.eu/(Schneider et al. 2011).
Context: Around 30 per cent of the observed exoplanets that orbit M dwarf stars are gas giants that are more massive than Jupiter. These planets are prime candidates for formation by disc instability.
What your voice would sound like on other planets and moons | Popular Science
No matter where you are, your voice is a product of how swiftly pressure waves move through your larynx and the frequency at which your vocal cords vibrate. But when shouted into different gases of varying densities, the same noises take on new forms. Here's how a few extraterrestrial atmospheres could change your tune.
Earth: Human vocal cords quiver at frequencies adapted to a Goldilocks atmosphere—not especially dense or light. Our air's plentiful nitrogen and scant carbon-dioxide molecules don't absorb many vibrations, so sound also happens to carry well.
Youthful discoveries: High school interns help NASA find new planets - Hawaii Tribune-Herald
NASA’s recent discovery of two new planets — one scientifically resembling Luke Skywalker’s home planet of Tatooine and another that’s Earth-sized and possibly habitable — are inspiring for a reason beyond the thrill of discovery.
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Wolf Cukier, 17, was interning at the Goddard Space Flight Center in Greenbelt, Md., when he spotted variations in data collected by NASA’s Transiting Exoplanet Survey Satellite, or TESS.
Profits for the Planet - Eos
As the climate changes, so do the words increasingly being used to describe start-ups and corporations that include "change the world" in their mission statements. This growing group of companies harnesses innovative technologies and scientific insight to perpetuate or pioneer cleaner agricultural practices, eco-friendly product design, optimized logistics, and other sustainable solutions.
Who better to join the effort than scientists-turned-entrepreneurs who can meet urgent environmental needs with enterprising efficiency, or small business purveyors whose values are expressed through their business practices?
Happening on Twitter
Planets really only come in two flavors - an astrophysicist explains why. https://t.co/XccR6ISCez AstronomyMag (from Our tiny corner of the cosmos) Wed Jan 29 15:03:07 +0000 2020
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