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An isotope in stardust could tell us how we got water on Earth


Strontium-87 (meaning 87 neutrons) is the isotope that can take us backwards through time to when Earth got its water. Tissot and his team found that the grains of stardust in the meteorite contain this isotope, which is a by-product of rubidium-87 decay. The amount of both these isotopes in the meteorite could tell us whether Earth formed as a dry planet or once had more water it eventually lost.
“There is a lot of rubidium-87 in the solar system because it is produced by other nucleosynthetic processes, which are the main contributors to the Solar system’s composition,” Tissot told SYFY WIRE. ....

Liz Murchison , Johnson Space Flight Center , Science Advances , Johnson Space Flight , ஜான்சன் இடம் விமானம் மையம் , ஜான்சன் இடம் விமானம் ,

OSIRIS-REx Begins Journey Home With Significant Asteroid Sample


OSIRIS-REx Begins Journey Home With Significant Asteroid Sample
Scientists are now one step closer to learning more about how our solar system formed – and, potentially, the origins of life. The OSIRIS-REx spacecraft, which was designed, built and flown by Lockheed Martin for NASA, departed asteroid Bennu and is headed back to Earth with a pristine asteroid sample. 
After a two-year, 1.4-billion-mile return cruise that includes two revolutions around the sun, OSIRIS-REx will catch up with Earth in its orbit in 2023 and jettison its sample return capsule. This protective capsule contains what is estimated to be well over the required 60 grams of regolith needed for scientific study, or roughly the size of a candy bar. ....

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Science Moms Help Other Moms Tackle Climate Change


Science Moms Help Other Moms Tackle Climate Change
Unmute
MADISON (WKOW) - The group is hoping to give moms the resources to not only talk but fight climate change.
Founded within the last five years, the group consists of eight climate scientists located across the United States; one scientist teaches at Texas Tech University while another teaches at Colorado State. Another scientist teaches at the University of Wisconsin - Madison. Her name is Tracey Holloway.
A math major originally, Holloway says she switched her career to study the atmosphere and the environment after looking at the atmosphere through a mathematic lens. Nearly two decades later, Holloway is teaching at both the Nelson Institute for Environmental Studies and the Department of Atmospheric and Ocean Sciences at the University of Wisconsin - Madison. ....

United States , Daniel Schrag , Tracey Holloway , Princeton University , Ocean Sciences , University Of Wisconsin , Earth Science Women Network , Department Of Atmospheric , Oceanic Sciences , Texas Tech University , Johnson Space Flight Center , Nelson Institute For Environmental , Nelson Institute , Environmental Studies , Space Flight Center , Earth Science Women , Science Moms , ஒன்றுபட்டது மாநிலங்களில் , டேனியல் ஸ்க்ராக் , ட்ரேசி ஹோலோவே , ப்ரிந்ஸ்டந் பல்கலைக்கழகம் , கடல் அறிவியல் , பல்கலைக்கழகம் ஆஃப் விஸ்கான்சின் , பூமி அறிவியல் பெண்கள் வலைப்பின்னல் , துறை ஆஃப் வளிமண்டலம் , டெக்சாஸ் தொழில்நுட்பம் பல்கலைக்கழகம் ,