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    Solar system planets and bodies research

    George1
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    Solar system planets and bodies research Empty Three Supersized Earths Spotted Orbiting Nearby Star

    Post  George1 Wed Apr 29, 2015 1:28 pm

    Three Supersized Earths Spotted Orbiting Nearby Star

    Solar system planets and bodies research 1021509034

    The new Automated Planet Finder telescope, dedicated to finding super-Earths and Earth-size exoplanets, has helped researchers discover planets orbiting star HD 7924.

    A team of astronomers has discovered three new planets orbiting a star 54 light-years away, using a ground-based robotic telescope which has enabled the scientists to speed up their search for small planets in the Sun's immediate celestial neighborhood.

    "The three planets are unlike anything in our solar system, with masses seven to eight times the mass of Earth and orbits very close to their host star," said graduate student Lauren Weiss, leader of the team at UC Berkeley, which works together with astronomers at the Universities of Hawaii, Tennessee State and University of California Observatories on the project to survey super-Earth planets orbiting nearby stars.

    All the planets orbit their star at a distance closer than Mercury orbits the sun, and complete their orbits in just five, 15 and 24 days.

    The first evidence of planets orbiting HD 7924 was found in 2009 by the W.M Keck Observatory in Hawaii, and measurements taken by the Automated Planet Finder [APF] Telescope at Lick Observatory in California validated their existence.

    The exoplanets, which are invisible to the naked eye due to their distance and are comparatively dim next to their host stars, were detected using the Doppler technique to detect the wobble of star HD 7924 as the planets orbited and pulled on it gravitationally. Doppler spectroscopy, or the 'wobble method,' detects the Doppler shift of the light coming from the star to deduce the planet's mass and orbit, a technique which has been used to find hundreds of exoplanets.

    This picture shows the Automated Planet Finder [APF] at Lick Observatory, which has been collecting measurements since January 2014 in the search for Earth-sized planets around nearby stars.

    The astronomers wrote software to enable the APF telescope to search for planets without a human in control, said Benjamin 'BJ' Fulton, a graduate student at the University of Hawaii at Manoa, having "initially used the APF like a regular telescope, staying up all night searching star to star."

    Fulton explained that the robotic observations are the start of a two-year project to systematically survey for super-Earth planets orbiting nearby stars.

    "When the survey is complete, we will have a census of small planets orbiting sun-like stars within approximately 100 light-years of Earth," he said.

    Andrew Howard, a professor of astronomy at the University of Hawaii, said the level of automation allowed by the robotic observation "is a game-changer in astronomy," and akin to "owning a driverless car that goes planet-shopping."

    The goal of the AFP, say the researchers, is to find small planets orbiting the nearest stars, some of which might have temperatures and surface conditions suitable for life.

    Read more: http://sputniknews.com/environment/20150429/1021514119.html#ixzz3YhF6z0kG

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    George1
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    Solar system planets and bodies research Empty Solar System Rocked by Discovery of Water on Mars

    Post  George1 Tue Sep 29, 2015 8:36 am

    Solar System Rocked by Discovery of Water on Mars

    Read more: http://sputniknews.com/news/20150929/1027684798.html#ixzz3n6giGeLw

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    George1
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    Solar system planets and bodies research Empty Re: Solar system planets and bodies research

    Post  George1 Fri Apr 12, 2019 12:44 am

    Scientists reveal first image of black hole


    The image was received as part of the Event Horizon Telescope project

    MOSCOW, April 10. /TASS/. A multinational group of scientists has revealed the first ever image of a black hole, located in the M87 galaxy about 53.5 million light years away.

    "In April 2017, all the dishes in the Event Horizon Telescope turned and stared at a galaxy 55 million light years away called M87 and the supermassive black hole at its core, and we are delighted to be able to report to you today that we have seen what we thought was unseeable. We have seen and taken a picture of a black hole," Sheperd Doeleman, of Harvard University and the Harvard-Smithsonian Center for Astrophysics, told reporters at the National Press Club in Washington.

    "We now have visual evidence for a black hole," he continued. "We now know that a black hole that weighs 6.5 billion times what our sun does exists in the center of M-87. This is the strongest evidence we have to date for the existence of black holes. It is also consistent … with Einstein’s predictions."

    The image was received as part of the Event Horizon Telescope project, which united eight radio telescopes all over the world, including in the United States, Mexico, Chile, Spain and France. Russia did not take part in the project because it has no telescopes of the required class.

    The project was launched to observe two super-massive black holes - SgrA* in the center of the Milky Way, some 26,000 light years away, and the object in the heart of the M87 galaxy (also known as Virgo A).

    The observations were carried out in April 2017, but it took two years to process the data.

    Discovery worthy of Nobel Prize

    Vyacheslav Dokuchayev, a leading researcher at the Institute for Nuclear Research of the Russian Academy of Sciences, described the project’s findings as "this year’s most prominent scientific discovery."

    "The result is at the level of the Nobel Prize," he told the Ekho Moskva radio. "At last, we received a direct evidence of the existence of black holes. I think two or three people [from the team of scientists] are obvious candidates [for the Nobel Prize], this is one of the most complicated experiments in physics."

    He expressed regret that Russia was not a part of the Event Horizon Telescope project.

    "In order to take part in this project, a certain type of radio telescope is needed. Regretfully, Russia has no such telescopes, with a mirror of 15-20 meters in diameter," the scientist said.

    Understanding the Universe

    Another Russian scientist, Alexander Lutovinov, a deputy head of the Russian Space Research Institute, said the Event Horizon Telescope project proved that our concept of how the Universe works was correct.

    "If astrophysics really managed to see the event horizon of a black hole - and, judging by today’s statements this is just the case - it means that our understanding of the Universe, of the Relativity Theory and physical laws is correct. This phenomenal discovery proves that our theories and our understanding of the world around us are correct," he said.

    "If the information that was unveiled today will be confirmed - and so far there is no reason not to trust it - then we are witnessing a great discovery that proves the theory. We have received the first direct evidence of the existence of super-massive black holes… in centers of major galaxies," the Russian scientist added.

    "Of course, it would be great if Russian scientists played major roles in similar projects," Lutovinov went on. "But achieving scientific progress and understanding how the Universe works requires powerful scientific equipment and instruments, and, therefore, serious investments are needed. So far, the Russian science cannot afford it.".


    More:
    http://tass.com/science/1053137

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    George1
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    Solar system planets and bodies research Empty Solar system planets and bodies research

    Post  George1 Fri Jun 05, 2020 10:55 pm

    Asteroid approaching Earth poses no serious danger, Roscosmos says


    The minimal distance between Earth and Asteroid 163348 (2002 NN4) will be 5.09 million kilometers, which is "too large to speak about any serious danger"


    MOSCOW, June 5. /TASS/. Asteroid 163348 (2002 NN4) will approach Earth on Saturday but is unlikely to hit it, Russian space corporation Roscosmos told TASS Friday.

    "According to information we have, the minimal distance between Earth and Asteroid 163348 (2002 NN4) will be 5.09 million kilometers," the state corporation said. This would be closer than the distance that asteroid 52768 (1998 OR2) reached in late April 2020 (about 6 million kilometers).

    According to Roscosmos, "this distance is too large to speak about any serious danger. The space corporation underscored that the scientists watch such objects closely, and therefore "various surprises are very unlikely here."

    Earlier, NASA reported that asteroid 163348 (2002 NN4) with a diameter between 250 and 570 meters will approach Earth by 5.1 million kilometers and pass by at the speed of 11.1 kilometers per second on June 6.

    https://tass.com/science/1164567

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    George1
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    Post  George1 Mon Feb 21, 2022 12:37 pm

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    JohninMK
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    Solar system planets and bodies research Empty One of the clearest illustrations of how science progresses

    Post  JohninMK Wed Apr 06, 2022 12:48 am

    One of the clearest illustrations of how science progresses. Two images of Pluto, only 25 years apart. Amazing.


    Solar system planets and bodies research FPcMV7cWYAIM3VJ?format=jpg&name=small

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    Post  kvs Wed Apr 06, 2022 2:54 am

    It looks cool but it is misleading. The high res image is from the New Horizons probe but the low res image is from the Hubble orbiting telescope.
    So it is apples and oranges and not the spectacular improvement in resolution implied.

    https://www.nationalgeographic.co.uk/photography/2019/01/pictures-from-nasas-farthest-flyby-reveal-space-snowman-1?image=16plutogallery_0

    https://medium.com/starts-with-a-bang/scientists-celebrate-plutos-discovery-with-a-retrospective-of-its-greatest-images-1a1722c30e17

    Sending new probes is real progress so in some sense the image is OK.

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    Solar system planets and bodies research Empty Re: Solar system planets and bodies research

    Post  nomadski Wed May 11, 2022 9:11 pm



    https://blogs.nasa.gov/webb/2022/05/09/miris-sharper-view-hints-at-new-possibilities-for-science/

    Finally we got first image from James Webb . They say images are sharp , and they do appear sharper , but there is a snow - flake distortion on the stars ! A function of the multi - mirror system ? Could this be corrected by computer programme , to reveal real image ? Are these images useful , in present state ?

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    Post  flamming_python Wed May 11, 2022 9:56 pm

    nomadski wrote:

    https://blogs.nasa.gov/webb/2022/05/09/miris-sharper-view-hints-at-new-possibilities-for-science/

    Finally we got first image from James Webb . They say images are sharp , and they do appear sharper , but there is a snow - flake distortion on the stars ! A function of the multi - mirror system ? Could this be corrected by computer programme , to reveal real image ? Are these images useful , in present state ?


    Interesting distortion

    More of an artifact really of the way the image is captured. It's always going to be something

    Yes it's possible to correct the image through software, and yes the images are all very useful regardless

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    George1
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    Post  George1 Wed Jun 28, 2023 12:46 pm

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    Post  Werewolf Wed Jun 28, 2023 3:32 pm

    JohninMK wrote:One of the clearest illustrations of how science progresses. Two images of Pluto, only 25 years apart. Amazing.


    Solar system planets and bodies research FPcMV7cWYAIM3VJ?format=jpg&name=small

    Make Pluto a planet again!
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    Post  sepheronx Wed Jun 28, 2023 8:58 pm

    Atari 5200 vs Playstation 4
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    Post  GarryB Thu Jun 29, 2023 5:20 am

    Finally we got first image from James Webb .

    That is not visible light, that is an IR image of heat.

    Make Pluto a planet again!

    They can't... there are an enormous number of objects in the Oort cloud that are bigger than Pluto and probably have a more circular orbit than Pluto whose orbit crosses the orbit of another planet.

    That is why Pluto is not a planet because kids in school can't learn the names of dozens and dozens of objects... many of which are just points of light that only the most powerful telescopes can even see.

    Equally if you did call it a planet it would need to be called a double planet because Charon, its moon, is almost half the size of Pluto...

    Pluto has 5 moons as far as we currently know thanks the recent flyby.

    Pluto is about a tenth of the weight of our moon.

    Solar system planets and bodies research Sxpra10

    Charon.

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    Werewolf
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    Post  Werewolf Thu Jun 29, 2023 9:19 am

    GarryB wrote:They can't... there are an enormous number of objects in the Oort cloud that are bigger than Pluto and probably have a more circular orbit than Pluto whose orbit crosses the orbit of another planet.

    A planet:
    NASA wrote:
       It must orbit a star (in our cosmic neighborhood, the Sun).
       It must be big enough to have enough gravity to force it into a spherical shape.
       It must be big enough that its gravity cleared away any other objects of a similar size near its orbit around the Sun.

    Discussion—and debate—will continue as our view of the cosmos continues to expand.

    Number 1 check
    Number 2 check
    Number 3 check

    The barycenter of Pluto and it's moon is not far away enough from Pluto to distort it's orbital force around the sun or to make it's moon orbiting the sun but not Pluto.

    The definition of astronomical objects is rather clear and it is still counted as a "dwarf" planet but at the same time not listed under planets.

    Solar system planets and bodies research ?u=https%3A%2F%2Fi.redd.it%2Fvmhg5y1mknv01
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    Post  GarryB Fri Jun 30, 2023 6:05 am

    Hahaha excellent try Werewolf, but it actually makes things worse.

    First of all what gives NASA the right to dictate what is or is not a planet.

    But lets look at what you have...

    Number one check,

    Number two check,

    Number three FAIL.... and much worse than just FAIL... it also fucks up Neptune, because Plutos orbit crosses the path of Neptune meaning neither of them can count as planets because they have not cleared each other out of their own orbital paths.

    The traditional idea of what things are is very thin... you could call Jupiter a failed sun or brown dwarf which would make the Sol system we live in a double star system making each of Jupiters enormous numbers of moons planets... it is all open to interpretation...
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    Post  Werewolf Fri Jun 30, 2023 11:56 am

    I am in full favor of anti-hypcracy and if the NASAs definition of a planet is full "passage" of planets orbital by no other object, (which in my opnion is a given since they do not collide), anyways, then they should denounce Neptune as well.

    I am not even sure if there is a consensus on a definition of what is a planet between NASA, scientists in the West and our ROSCOSMOS and our scientists.

    The Jupiter part, well it's not a center of our solar system A) and B) it's not illuminating our solar system, but more or less I agree with you regarding the wishy washy approach of definition, which NASA themselves state "up for discussion" on their webpage of 'What is a Planet'.
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    Post  George1 Thu Oct 05, 2023 11:38 pm

    GarryB
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    Post  GarryB Fri Oct 06, 2023 12:49 pm

    I am in full favor of anti-hypcracy and if the NASAs definition of a planet is full "passage" of planets orbital by no other object, (which in my opnion is a given since they do not collide), anyways, then they should denounce Neptune as well.

    Well after looking at other star systems it seems that many theories we had were totally wrong, like that gas giants are normal when they are distant from their star and that all planets close to their stars will be rocky.

    Gas giant planets are obviously easy to spot but are not all a great distance from their stars.

    We thought they would have to be cold or the stellar wind from their stars would blow all the gas off them, but there are stars bigger than Jupiter found closer than Mercury is to our sun in some star systems so they must be very hot.

    It is pretty clear that planets move and that they can significantly change their orbit and even crash into one another.

    We thought things probably just stabilise very quickly but clearly they don't.

    For all we know the rings of Saturn might be very very new, but we don't even know how old they are.

    If we accept that planet orbits can be shifted then what happens when it does shift... how long do you give it to clear its orbital plane?

    All the currently accepted "planets" in our solar system travel on the same plane, but not only is Pluto not on exactly the same plane, Uranus... which is relatively close by has a near vertical equator... in other words it is on its side in comparison to how it moves around the sun.

    Is this evidence of a collision... is our moon evidence of a collision... is Pluto and Charons unusual orbit path and angle evidence of a collision?

    Sounds to me like there have been a few collisions that has mess things up, and it probably hasn't finished yet... who knows how many planet sized objects there are out there in a very odd orbit of the sun... an object from the oort cloud that orbits the sun but not in a circular orbit or in the same plane as the other planets is called a comet but Pluto and Charon and its other moons are certainly not comets.

    In a sense Neptune is every bit a planet, but perhaps you could argue that Pluto and Charon are objects captured by Neptune from the oort cloud...

    The Jupiter part, well it's not a center of our solar system A)

    Don't be so solar system centric... the vast majority of star systems are binaries with two stars... why do you think there needs to be a single star in the middle of a star system.

    Sorry, but one of the best computer games I ever played was called Frontier Elite II... it was amazing... it came on one Amiga 500 880K floppy disk and was written and programmed by an English guy and it was amazing. You could fly from star system to star system in your spaceship using a hyperspace engine, but inside a star system you had hydrogen rocket propulsion. You could point your nose in any direction and accelerate time 1,000 times or 100,000 times and put the rocket motor on and accelerate to enormous speeds... it was great fun, and it modelled most of the stars in our galaxy. It obviously modelled the solar system about right, but obviously with space stations and space ports on most of the planets and moons, but all the other star systems it made up with space ports and colonies on made up planets.

    There were amazing star systems with multiple stars with stars orbiting stars and planets orbiting the stars... it was really amazing and complex... imagine a three star system with a red dwarf, a normal yellow range star and a red giant...

    I must go dig that game out again and see if it still works.

    You could take off from the surface of a planet and fly up through the atmosphere and accelerate into space and fly across the solar system to another planet and either keep flying towards the planet and then land or approach a space station and land on that.

    You would transition from free flight to being caught in an objects gravity as you got very close... very useful as most of the space stations rotated.
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    Post  George1 Sun Feb 11, 2024 3:09 pm

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