In Ecology Studies and Selfless Ants, He Finds Hope for the Future
Dragomir said the radius gap points to possible rules both about how planets are formed, and what happens to them early on. Though some kind of atmosphere loss is a reasonable guess, it is just one of three general ideas, said Sara Seager , an astronomer at MIT who is deputy science director for the TESS mission. The gap adds detail to emerging statistical patterns. In many exoplanet systems, as in our own backyard, astronomers are finding that smaller worlds tend to orbit close to their host stars, and bigger planets are more distant. They could begin big like their far-flung brethren, but lose their atmospheres, and thereby lots of mass, to the searing heat and ultraviolet radiation of their stars.
Scientists think something like this happened to Mars. It started out with a thicker atmosphere, but once it lost its protective magnetic field, the sun was free to slowly blow that atmosphere away. Even Earth is still losing some of its hydrogen shell, Seager said. But people are trying. Some astronomers think they are rock balls shrouded in thick atmospheres of hydrogen gas, while others argue they are shrouded in water, whether solid, liquid or vapor.
Some could be up to 50 percent water, which would come in a variety of exotic forms. They are different worlds compared to our own Earth.
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Zeng said these super-Earths or mini-Neptunes might be more common than the planets of our solar system, and there might indeed be no place like home. But Dragomir is more circumspect.
She noted that Kepler had almost a decade to pick out patterns among its planet cornucopia, but TESS is just getting started. And TESS will focus on bright, nearby stars, which will be possible to study with ground-based telescopes for follow-up observations. Broadband seismology looks at a broad spectrum of waves for high-resolution imaging.
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By its nature seismology is indirect research and has limitations for interpreting features like temperature, melting, and exact composition. So Wagner looks at the bigger picture. She Meet this Scientist More Scientists. Skip to main content. Understanding Earth, other planets, and their place in the cosmos. Carnegie's Scott Sheppard shares Farinella Prize.
Explore this Story. TESS mission helps uncover trio of planets with one possibly habitable world. Fellows are recognized for visionary leadership and Washington, DC—Some volcanoes take their time—experiencing protracted, years-long periods of unrest before eventually erupting. This makes it difficult to forecast when they pose a danger Pasadena, CA— Sometimes there is more to a planetary system than initially meets the eye.
Washington, DC—The first minerals to form in the universe were nanocrystalline diamonds, which condensed from gases ejected when the first generation of stars exploded. Diamonds that Two New Venture Grants Awarded. And how do scientists identify those features on other worlds? A team of Carnegie Explore Carnegie Projects. The WGESP was charged with acting as a focal point for research on extrasolar planets and organizing IAU activities in the field, including reviewing techniques and maintaining a list of identified planets.
Explore this Project. Carnegie Planet Search.
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Carnegie's Paul Butler has been leading work on a multiyear project to carry out the first reconnaissance of all 2, nearby Sun-like stars within light-years of the solar system 1 lightyear is about 9. His team is currently monitoring about 1, stars, including Meet Carnegie Scientists. Diana Roman. Toward this end she uses space and field-based geodesy--the mathematics Richard Carlson - Director.
Geochemist and director of Terrestrial Magnetism, Richard Carlson, looks at the diversity of the chemistry of the early solar nebula and the incorporation of that chemistry into the terrestrial planets. You May Also Like Washington, D. You may also like The mantle Their findings are an important Learn More. If you are interested in receiving any of our materials, learn more.