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สอนโหราศาสตร์ยูเรเนียน โหราศาสตร์

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Dennis Overbye A larger set of first light images taken by TESS. The larger frame at the top of the story is in the bottom row here, second from right.CreditNASA/MIT/TESS TESS สอนยูเรเนียน was launched on April 18 from Cape Canaveral aboard a SpaceX Falcon 9 rocket, and is now ensconced in a looping orbit of the Earth that takes it all the way out to the moon and then back close to Earth to dump its data. It has four cameras that stare at orange slices of the sky from pole to equator for 27 days at a time. Among the 73 candidates, the TESS team announced on Wednesday, is a so-called super-Earth. It circles the sun-like star Pi Mensae at a distance of about 7 million miles every 6.3 days, a distance Dr. Ricker described as quite a bit too toasty to be habitable by the likes of us. The same star was already known to harbor a planet some 10 times as massive as Jupiter with a six-year orbit. That leaves that star with two planets one too hot and one too cold. Only a day later they unveiled another possible planet, a so-called hot earth, that circles a nearby small dim red dwarf star known as HS 3844 in an incredibly tight orbit only about a million miles from its sun. The discovery of a terrestrial planet around a nearby M dwarf during the first TESS observing sector suggests that the prospects for future discoveries are bright.

For the original version including any supplementary images or video, visit https://www.nytimes.com/2018/09/20/science/nasa-tess-planets.html

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Postman (STScI), the CLASH Team, Hashimoto et al. Distant galaxy hints at universes earliest stars The universes first stars may have formed a mere 250 million years after the big banghundreds of millions of years earlier สอนโหราศาสตร์ยูเรเนียน than thought, according to a new study. The find comes thanks to observations of an ancient galaxy known as MACS1149-JD1, first detected in 2012. In 2016 and 2017, a team of astronomers took another look using the Atacama Large Millimeter/submillimeter Array (ALMA), a collection of 64 radio telescopes in Chile. They measured the frequency of a peak in the galaxys spectrum that comes from ionized oxygen gas. When that light was produced in MACS1149-JD1 it was in the infrared, but during its billions of years journeying to Earth, the expansion of the universe stretched it out to the microwave frequencies that ALMA is sensitive to. Measuring that shift in frequencies reveals that the light set out 13.3 billion years ago, when the universe was just 550 million years old. The fact that it was an oxygen line is significant: No oxygen was produced in the big bang; it was formed later when hydrogen gas coalesced into the first generation of stars and fusion reactions in their cores forged hydrogen into oxygen and other elements. At the end of their lives, the stars exploded, spreading those elements through space. For MACS1149-JD1 to contain substantial amounts of oxygen, many stars must have already gone through that whole life cycle. The researchers report in today that they then observed the galaxy in optical frequencies using the Hubble and Spitzer space telescopes to understand its star formation, concluding that it must have begun 300 million years earlier .

For the original version including any supplementary images or video, visit http://www.sciencemag.org/news/2018/05/distant-galaxy-hints-universe-s-earliest-stars

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