NASA tracking Beta’s heavy rainfall into lower Mississippi Valley
(NASA/Goddard Space Flight Center) Slow-moving post-tropical storm Beta continues to drop large amounts of rainfall in Texas as it moves into the Lower Mississippi Valley on Sept. 23. A NASA satellite rainfall product that incorporates data from satellites and observations estimated Beta’s rainfall rates.
Can ripples on the sun help predict solar flares?
Scientists discovered in 1996 that sunquakes are linked to solar flares. Now, using helioseismic holography, scientists have analyzed a 2011 flare and shown that the impulsive source that generated the sunquake, and the refracted acoustic waves that later rippled the solar surface, was submerged 1,000 kilometers below the photosphere and flare. Further sunquake study could reveal if submerged sources are common and whether they can predict the appearance of flares and potential impact on Earth.
Can ripples on the sun help predict solar flares?
Scientists discovered in 1996 that sunquakes are linked to solar flares. Now, using helioseismic holography, scientists have analyzed a 2011 flare and shown that the impulsive source that generated the sunquake, and the refracted acoustic waves that later rippled the solar surface, was submerged 1,000 kilometers below the photosphere and flare. Further sunquake study could reveal if submerged sources are common and whether they can predict the appearance of flares and potential impact on Earth.
Unexpected wildfire emission impacts air quality worldwide
During wildfires, nitrous acid plays a leading role — spiking to levels significantly higher than scientists expected, driving increased ozone pollution and harming air quality, according to a new study.
Small asteroid will sweep close this week
Asteroid 2020 SW will sweep closest – closer than weather satellites – on September 24. It will not hit us. It’ll brighten as it draws near, but never enough to see with the eye alone. Charts here for telescope users.
A New York Clock That Told Time Now Tells the Time Remaining – The New York Times
For more than 20 years, Metronome, which includes a 62-foot-wide 15-digit electronic clock that faces Union Square in Manhattan, has been one of the city’s most prominent and baffling public art projects. Its digital display once told the time in…
Young moon after sunset September 18 to 21
After sunset these next several days – September 18, 19, 20 and 21, 2020 – watch for the waxing crescent moon’s return to the evening sky.
NASA estimates powerful hurricane Teddy’s extreme rainfall
(NASA/Goddard Space Flight Center) Using a NASA satellite rainfall product that incorporates data from satellites and observations, NASA estimated Hurricane Teddy’s rainfall rates. Teddy is a major hurricane in the Central North Atlantic Ocean.
Whatâs the youngest moon you can see with your eye alone?
It has long been a sport for skywatchers to spot the youngest possible crescent moon after sunset, with the eye alone. What does it take to see a very young moon? Details here.
NASA analyzes rainfall and rainmaking capability in Hurricane Sally
(NASA/Goddard Space Flight Center) NASA satellites provided a look at the rainfall potential in Hurricane Sally before and after it made landfall in southern Alabama. NASA’s Aqua satellite and IMERG analysis were used to analyze the storm’s flooding potential.
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