Tuesday, August 31, 2021

Watch Live: Biden Is Expected To Deliver Remarks After The Last U.S. Troops Leave Afghanistan

President Biden will address the nation on his decision to pull U.S. troops out of Afghanistan. He is being criticized for having the troops leave before all Americans were evacuated from the country.

President Biden will address the nation on his decision to pull U.S. troops out of Afghanistan. He is being criticized for having the troops leave before all Americans were evacuated from the country.

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Tips For Keeping Kids Safe As School Resumes

Here are the best masks for kids, other ways to make their class time safer, and what to do in case of symptoms or exposure
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APOD - A Blue Moon in Exaggerated Colors

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2021 August 31
The picture shows the full moon in high resolution and exaggerated colors.  Please see the explanation for more detailed information.

A Blue Moon in Exaggerated Colors
Image Credit & Copyright: Robert Fedez

Explanation: The Moon is normally seen in subtle shades of grey or gold. But small, measurable color differences have been greatly exaggerated to make this telescopic, multicolored, moonscape captured during the Moon's full phase. The different colors are recognized to correspond to real differences in the chemical makeup of the lunar surface. Blue hues reveal titanium rich areas while orange and purple colors show regions relatively poor in titanium and iron. The familiar Sea of Tranquility, or Mare Tranquillitatis, is the blue area toward the upper right. White lines radiate across the orange-hued southern lunar highlands from 85-kilometer wide ray-crater Tycho at bottom right. The full moon that occurred earlier this month could be counted as a seasonal blue moon because it was, unusually, the third of four full moons to occur during northern summer (and hence southern winter). The featured 272-image composite demonstrates that the full Moon is always blue, but usually not blue enough in hue to ooh.

Almost Hyperspace: Random APOD Generator
Tomorrow's picture: galactic ghosts


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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
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Monday, August 30, 2021

The Final U.S. Military Plane Has Left Afghanistan, Marking The War's End

The U.S. withdrawal leaves the future of Afghanistan in disarray and uncertainty under renewed Taliban rule.

The U.S. withdrawal leaves the future of Afghanistan in disarray and uncertainty under renewed Taliban rule.

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APOD - A Fire Rainbow over West Virginia

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2021 August 30
The picture shows a solar circumhorizontal arc -- nicknamed a fire rainbow  -- over West Virgina, USA.   Please see the explanation for more detailed information.

A Fire Rainbow over West Virginia
Image Credit: Christa Harbig

Explanation: What's happening to this cloud? Ice crystals in a distant cirrus cloud are acting like little floating prisms. Known informally as a fire rainbow for its flame-like appearance, a circumhorizon arc appears parallel to the horizon. For a circumhorizontal arc to be visible, the Sun must be at least 58 degrees high in a sky where cirrus clouds present below -- in this case cirrus fibrates. The numerous, flat, hexagonal ice-crystals that compose the cirrus cloud must be aligned horizontally to properly refract sunlight in a collectively similar manner. Therefore, circumhorizontal arcs are somewhat unusual to see. The featured fire rainbow was photographed earlier this month near North Fork Mountain in West Virginia, USA.

Tomorrow's picture: true moon blue


< | Archive | Submissions | Index | Search | Calendar | RSS | Education | About APOD | Discuss | >

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.


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Delicious foods, like avocado toast or an egg white scramble with spinach, can go a long way toward lowering your "unhealthy" LDL cholesterol and raising your "healthy" HDL cholesterol.