This illustration shows a red dwarf star orbited by a hypothetical exoplanet. Credit: NASA/ESA/G. Bacon (STScI)
An international team of researchers with participation from the University of Göttingen has discovered the first large gas giant orbiting a small star. The planet was found orbiting the nearby red dwarf star GJ 3512. This discovery challenges scientists’ very understanding of how planets form: low-mass stars should have less available material to form planets! Understanding of How Planets Form Challenged by Giant ...scitechdaily.com/ ...by-giant...This discovery challenges scientists' very understanding of how planets form : low-mass stars should have less available material to form planets . Moreover, this new gas giant is on an eccentric orbit, which suggests the presence of another massive planet …!! Moreover, this new gas giant is on an eccentric orbit, which suggests the presence of another massive planet, which may have been ejected from the system in a chaotic interaction! How do planets form? | HowStuffWorks .../ ...planets-form .htm Then, in 1995, astronomers discovered the distant planet 51 Pegasi b, a "hot Jupiter," or gas giant, that orbited very close to its sun. This discovery called for new theories, primarily that such planets must form far away from the central star and then move into a closer orbit.!! The results were published in Science .
* * *
The Institute for Astrophysics at the University of Göttingen calibrated the data, a task that is fundamental to understanding the minute affect the motion of the planet or planets exert on a star. The Institute is also responsible for the analysis of the enormous amount of complex data sent from the observatory! HubbleSite - Discovering Planets Beyond - How Do Planets Form? ...planets _beyond/ ...planets-form According to our current understanding , a star and its planets form out of a collapsing cloud of dust and gas within a larger cloud called a nebula. As gravity pulls material in the collapsing cloud closer together, the center of the cloud gets more and more compressed and, in turn, gets hotter.!! Every day, fresh information arrives at the institute and is converted into numbers that the CARMENES consortium scientists can then interpret as stellar motion.
Were you following this:
This is the closest solar system to Earth containing multiple planets - CNN
(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.
Spot six planets in the sky this week: Mercury, Mars, Uranus and more | New Scientist
THE coming week is a great time to look for planets. A new moon on 28 October means no moonlight and, with the exception of Neptune , every planet is visible at some point in the coming days. Even distant Uranus, which at 8 pm GMT on 27 October will be a mere 2.8 billion kilometres away.
Venus is the easiest to find, with an apparent magnitude of -4.6. In the magnitude scale, objects with lower numbers are brighter! Giant exoplanet around tiny star challenges understanding ...The planet orbits the nearby red dwarf star GJ3512. This discovery challenges scientists' understanding of how planets form : low-mass stars should have less available material to form planets .!! It is close to the sun, …
A Churning 'Molten Blob' of Planet May Be Easier to Find. Here's Why. | Space
The smaller a planet , the more difficult it is to spot — which is frustrating for scientists hoping to find Earth-like worlds.
That's why a team of researchers set out to determine what planetary traits would make a world a little easier to identify! Videos for Understanding Of How Planets Form Understanding of How Planets Form Challenged by Giant Exoplanet Around Tiny Star scitechdaily.com!! Their analysis suggests that molten worlds with atmospheres full of water or carbon dioxide will be more easily observed by instruments that will be available to scientists soon.
* * *
And that's a boon for observers: If two planets have the same mass but one has a magma ocean and the other doesn't, it could be about 5% larger across, making it easier to spot. And a molten world is more likely to be leaking water and carbon dioxide from that liquid rock out into a developing atmosphere.
Those two molecules are easily released by molten rock, but they are also the sort of thing that future telescopes like NASA's James Webb Space Telescope are being designed to detect. Webb won't be able to study Earth-size planets around stars like our sun, but it should be able to analyze those around smaller M dwarf stars.
Other things to check out:
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. 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. It is very difficult to explain the formation of such a large satellite using current models of moon formation.
NASA Administrator: 'I believe Pluto is a planet' | TheHill
"I am here to tell you, as the NASA Administrator, I believe Pluto should be a planet," he said, to applause, during a speech at the International Astronautical Congress in Washington, D.C.
"I like there being nine planets, how about that?" he added later, noting Pluto's buried ocean, moons and multilayered atmosphere.
Pluto was stripped of its planet status in 2006 when the International Astronomical Union (IAU) made the controversial decision to downgrade it to a "dwarf planet."
Bridenstine, a former Oklahoma congressman, has voiced support for classifying Pluto as a planet in the past.
"You can write that the NASA administrator declared Pluto a planet once again," he said during an August speech at the University of Colorado. "I'm sticking by that. It's the way I learned it and I'm committed to it."
"Having a long record gives people the understanding that these ideas that I am talking about — they are in my guts… https://t.co/ZwTtJjcwvm fshakir (from D.C.) Sat Oct 26 12:31:57 +0000 2019
Understanding the ME or global geopolitics would often deep fry the brains of even the most professionals....there… https://t.co/rJHQzKVLCw ZaidZamanHamid (from Pakistan) Sun Oct 27 06:19:36 +0000 2019
No comments:
Post a Comment