(CNN) Just 11 light years from earth is the GJ 15 A star system with two planets orbiting a red-dwarf star. This makes it the closest solar system to Earth that contains multiple planets.
This may worth something:
What moons in other solar systems reveal about planets like Neptune and Jupiter
Bradley Hansen does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.
* * *
What is the difference between a planet-satellite system as we have with the Earth and Moon, versus a binary planet – two planets orbiting each other in a cosmic do-si-do?
In 2018, two astronomers from Columbia University reported the first tentative observation of an exomoon – a satellite orbiting a planet that itself orbits another star. One curious feature was that this exomoon Kepler-1625b-i was much more massive than any moon found in our solar system! This is the closest solar system to Earth containing ...fox43.com /2019/10/17/ ...containing...Just 11 light years from earth is the GJ 15 A star system with two planets orbiting a red-dwarf star. This makes it the closest solar system to Earth that contains multiple planets. The Alpha...!! It has a mass similar to Neptune and orbits a planet similar in size to Jupiter.
Astronomers expect moons of planets like Jupiter and Saturn to have masses only a few percent of Earth. But this new exomoon was almost a thousand times larger than the corresponding bodies of our solar system – moons like Ganymede and Titan which orbit Jupiter and Saturn, respectively! Videos for This Is The Closest Solar System To 0:33 In our solar system , which planet is closest to the sun? YouTube!! It is very difficult to explain the formation of such a large satellite using current models of moon formation.
Which Planet Has The Most Moons?
Jupiter may be the undisputed king of the planets in the solar system, but its record of 79 moons has just been smashed after the announcement of a stunning 20 new outer moons at Saturn.
Previously thought to have 62 moons, the discovery puts the ringed planet's new total at a peerless 82 moons.
Announced Monday by the International Astronomical Union's Minor Planet Center, all 20 are outer moons about three miles/five kilometers in diameter.
An artist's conception of the 20 newly discovered moons orbiting Saturn. These discoveries bring the ... [+] planet's total moon count to 82, surpassing Jupiter for the most in our Solar System! What's the nearest solar system to our own? | Space Facts ...-own Of the solar systems discovered so far, the closest one is around the star named Epsilon Eridani , "just" 10.5 light years away (although that's still about 100 trillion kilometres!). This isn't the only answer though, as Epsilon Eridani has just one planet, so it's necessary to travel even further to find the nearest multiple planet solar system .!! Studying these moons can reveal information about their formation and about the conditions around Saturn at the time. Illustration is courtesy of the Carnegie Institution for Science.
Minnesota Starwatch for November: Planets, constellations make their celestial entrances |
This may worth something:
A Science-Based Origin Story for a Planet-Changing Species - Scientific American Blog Network
The young Earth was wrapped in a warm blanket of greenhouse gases such as carbon dioxide and methane, that were burped up from deep under the crust! This is the closest solar system to Earth containing ...www.cnn.com ...system -scn/index.html This is the closest solar system to Earth containing multiple planets - CNN Just 11 light years from earth is the GJ 15 A star system with two planets orbiting a red-dwarf star . This makes it the...!! A greenhouse atmosphere kept its oceans liquid even though solar emissions were much weaker than today! This is the closest solar system to Earth containing ...fox61.com/2019/10/16/ ...containing...This is the closest solar system to Earth containing multiple planets Just 11 light years from earth is the GJ 15 A star system with two planets orbiting a red-dwarf star .!! Surface temperatures were regulated by geological feedback mechanisms that tweaked the levels of greenhouse gases. When temperatures rose, more water evaporated from the oceans and there was more rainfall. More rainfall washed large amounts of carbon dioxide from the atmosphere. Dissolved carbon dioxide formed carbonic acid, which eventually buried lots of carbon in carbonate rocks in the oceans. Some got buried even deeper, beneath the crust.
But the small, scurrying, rodentlike organisms that were our mammalian ancestors generally did better. In a post-asteroid world, mammals flourished, diversified and became the dominant animal species on land. Our primate ancestors were among the survivors. Mammals were warm-blooded, so they needed lots of energy, so they needed plenty of food, so they needed more smarts, which is one reason why they were generally brainier than dinosaurs. Primates were particularly brainy.
NASA must rework planetary protection plans, panel advises | Science | AAAS
Planetary protection, as such efforts are known, remains a worthy goal, the report emphasizes. But many of the ways it is implemented, which date back to rules conceived at the beginning of the space age, have driven costly and sometimes questionable efforts, and do not make sense given current scientific knowledge, says Alan Stern, a planetary scientist from the Southwest Research Institute in Boulder, Colorado, who led the 12-member panel reviewing NASA's efforts. "We want to move from this 1960s–70s point of view that all of Mars was treated one way." Planetary surfaces are more nuanced than that, he says.
Concerns over planetary protection have often seen NASA make great efforts to prevent microbes from going to space. Its martian robots are assembled in cleanrooms, with many components baked in ovens or doused in chemicals. Famously, its Viking landers for Mars in the 1970s were baked in purpose-built ovens. But these protections have often been costly and, in the view of some scientists , overly burdensome.
Just 11 light years from earth is a star system with two planets orbiting a red-dwarf star. This makes it the close… https://t.co/CGfegkO7Xq CNN Thu Oct 17 07:43:14 +0000 2019
No comments:
Post a Comment