Wikipedia dicit:
A total solar eclipse occurred at the ascending node of the Moon’s orbit on July 2, 2019, with an eclipse magnitude of 1.0459. Totality was visible from the southern Pacific Ocean east of New Zealand to the Coquimbo Region in Chile and Central Argentina at sunset, with the maximum of 4 minutes 32 seconds visible from the Pacific Ocean.
Video Credit: NASA
NASA dicit:
In the mid-1800s, mariners sailing the southern seas navigated at night by a brilliant star in the constellation Carina. The star, named Eta Carinae, was the second brightest star in the sky for more than a decade. Those mariners could hardly have imagined that by the mid-1860s the brilliant orb would no longer be visible. Eta Carinae was enveloped by a cloud of dust ejected during a violent outburst named “The Great Eruption.”
Because of Eta Carinae’s violent history, astronomers have kept watch over its activities. Although Hubble has monitored the volatile superstar for 25 years, it still is uncovering new revelations. Using Hubble to map the ultraviolet-light glow of magnesium embedded in warm gas, astronomers were surprised to discover the gas in places they had not seen it before.
Paul R. Morris (USRA): Lead Producer
Aaron E. Lepsch (ADNET): Technical Support
Video Credit: NASA’s Goddard Space Flight Center
NASA dicit:
NASA’s satellite imagery and model forecasts play an important role in monitoring the performance of crops worldwide and preparing for food shortages. NASA’s view from space helps government agencies forecast food insecurity, like during the drought in Southern Africa in 2018.
Kathryn Mersmann (USRA): Lead Producer
Maria-Jose Vinas Garcia (Telophase): Lead Writer
Ellen T. Gray (ADNET): Producer
Trent L. Schindler (USRA): Lead Visualizer
Christa Peters-Lidard (NASA/GSFC): Scientist
John D. Bolten (NASA/GSFC): Scientist
Amy McNally (SAIC): Scientist
Video Credit: NASA’s Goddard Space Flight Center
NASA dicit:
A fully functional Launch Abort System (LAS) with a test version of the Orion spacecraft attached, launches on NASA’s Ascent Abort-2 (AA-2) atop a Northrop Grumman provided booster on July 2, 2019, at 7 a.m. EDT, from Launch Pad 46 at Cape Canaveral Air Force Station in Florida. During AA-2, the booster will send the LAS and Orion to an altitude of 31,000 feet at Mach 1.15 (more than 1,000 mph). The flight test will prove that the abort system can pull crew to safety in the unlikely event of an emergency during ascent.
Video Credit: NASA’s Kennedy Space Flight Center
Wikipedia dicit:
An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems, and is recognized by the discoloration in the water from their pigments. Cyanobacteria were mistaken for algae in the past, so cyanobacterial blooms are sometimes also called algal blooms. Blooms which can injure animals or the ecology are called “harmful algal blooms” (HAB), and can lead to fish die-offs, cities cutting off water to residents, or states having to close fisheries. A bloom can block the sunlight from reaching other organisms, deplete oxygen levels in the water, and some algae even secrete toxins into the water.
Video Credit: NASA’s Goddard Space Flight Center
NASA dicit:
What does a half-century of lunar science sound like? Join Moon data expert Ernie Wright on a musical time-traveling journey through the Apollo program and the exploration era of today. We explore what we knew about the Moon before Apollo, what we discovered because of it and the mysteries today’s scientists are working to solve.
Video Credit: NASA’s Goddard Space Flight Center
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