UA-113443594-1

How to weigh stars with gravitational lensing

Every star in the Milky Way is in motion. But because of the distances their changes in position, the so-called proper motions, are very small and can only be measured using large telescopes over long time periods. In very rare cases, a foreground star passes a star in the background, at close proximity as seen from Earth. Light from this background star must cross the…

NASA’s Aqua Satellite finds a more organized, large Tropical Storm Ampil

IMAGE: On July 18, the MODIS instrument aboard NASA's Aqua satellite captured a visible light image of Tropical Storm Ampil in the Northwestern Pacific Ocean that showed it was more organized.... view more  Credit: NASA/NRL When NASA's Aqua satellite passed over the Northwestern Pacific Ocean on July 19, the large Tropical Storm Ampil appeared much more organized than it did the previous day. On July 19…

New instruments push boundaries for precise measurements in jet engines, gas...

IMAGE: Members of Petal Solutions LLC, which is developing instruments to precisely measure pressure, temperature and other analytics inside the harsh environments of rocket engines and gas turbines. The members are... view more  Credit: (Petal Solutions) WEST LAFAYETTE, Ind. - A Purdue University-affiliated startup is developing instruments to precisely measure pressure, temperature and other analytics inside the harsh environments of rocket engines and gas turbines. Petal…

Tropical Cyclone Son-Tinh makes landfall and NASA examines its trail of...

Tropical Cyclone Son-Tinh made landfall in Vietnam and left a trail of heavy rainfall in its wake. NASA's Global Precipitation Measurement mission or GPM core satellite provided an estimate of that soggy trail through the Gulf of Tonkin. Tropical storm Son-Tinh struck Hainan Island, China and was headed toward northern Vietnam when the GPM core observatory satellite passed over the Gulf of Tonkin, South China…

Traveling to the sun: Why won’t Parker Solar Probe melt?

This summer, NASA's Parker Solar Probe will launch to travel closer to the Sun, deeper into the solar atmosphere, than any mission before it. If Earth was at one end of a yard-stick and the Sun on the other, Parker Solar Probe will make it to within four inches of the solar surface. Inside that part of the solar atmosphere, a region known as the…

Discovering structure in the outer corona

In 1610, Galileo redesigned the telescope and discovered Jupiter's four largest moons. Nearly 400 years later, NASA's Hubble Space Telescope used its powerful optics to look deep into space -- enabling scientists to pin down the age of the universe. Suffice it to say that getting a better look at things produces major scientific advances. In a paper published on July 18 in The Astrophysical…

CALET succeeds in direct measurements of cosmic-ray electron spectrum up to...

IMAGE: Approximately doubled statistics above 500GeV by using full acceptance of CALET. view more  Credit: Waseda University An international team of researchers succeeded in extending their result from a previous study and directly measured the cosmic-ray all-electron (electron + positron) spectrum in an energy range from 11 GeV to 4.8 TeV with the Calorimetric Electron Telescope (CALET). CALET, a detector optimized to observe high-energy electrons, was…

Suomi NPP satellite finds an elongated Tropical Storm Ampil

IMAGE: On July 19, NASA-NOAA's Suomi NPP satellite captured an infrared image of newly formed Tropical Storm Ampil in the Philippine Sea. Red and yellow colors indicate coldest temperatures and strongest... view more  Credit: NASA/NOAA/NRL Tropical Depression 12W formed in the Philippine Sea and NASA-NOAA's Suomi NPP satellite analyzed the storm in infrared light. The depression strengthened into Tropical Storm Ampil later on July 18. On…

SD mines scientists and students contribute to IceCube breakthrough

RAPID CITY, SD (July 17, 2018) - An international team of scientists, including researchers at the South Dakota School of Mines & Technology, have found the first evidence of a source of high-energy cosmic neutrinos, ghostly subatomic particles that can travel unhindered for billions of light years from the most extreme environments in the universe to Earth. Detecting high-energy cosmic neutrinos requires a massive particle…

Billion-year-old lake deposit yields clues to Earth’s ancient biosphere

A sample of ancient oxygen, teased out of a 1.4 billion-year-old evaporative lake deposit in Ontario, provides fresh evidence of what the Earth's atmosphere and biosphere were like during the interval leading up to the emergence of animal life. The findings, published in the journal Nature, represent the oldest measurement of atmospheric oxygen isotopes by nearly a billion years. The results support previous research suggesting…
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