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NASA Astronomy Picture of the Day:

Why does a cloudy moon sometimes appear colorful? The effect, called a lunar corona, is created by the quantum mechanical diffraction of light around individual, similarly-sized water droplets in an intervening but mostly-transparent cloud. Since light of different colors has different wavelengths, each color diffracts differently. Lunar coronae are one of the few quantum mechanical color effects that can be easily seen with the unaided eye. Solar coronae are also sometimes evident. The featured image was taken last month from Paris, France. The blue beacon emanating from the Eiffel Tower did not affect the colorful lunar corona. Portal Universe: Random APOD Generator

Photo by Valter Binotto

NASA Astronomy Picture of the Day:

What happens if you ascend this stairway to the Milky Way? Before answering that, let's understand the beautiful sky you will see. Most eye-catching is the grand arch of the Milky Way Galaxy, the band that is the central disk of our galaxy which is straight but distorted by the wide-angle nature of this composite image. Many stars well in front of the Milk Way will be visible, with the bright white star just below the stellar arch being Altair, and the bright blue star above it being Vega. The air glows green on the left, just above the yellow cloud deck. The featured image was taken last month on Portugal's Madeira Island in the North Atlantic Ocean. Oh, and what happens after you reach the top of these stairs and admire the amazing sky is, quite probably, that you then descend down the stairs on the other side. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)

Photo by Marcin Rosadziński

NASA Astronomy Picture of the Day:

It's back. The famous active region on the Sun that created auroras visible around the Earth earlier this month has survived its rotation around the far side of the Sun -- and returned. Yesterday, as it was beginning to reappear on the Earth-facing side, the region formerly labeled AR 3664 threw another major solar flare, again in the highest-energy X-class range. The featured video shows the emerging active region on the lower left, as it was captured by NASA's Earth-orbiting Solar Dynamics Observatory yesterday in ultraviolet light. The video is a time-lapse of the entire Sun rotating over 24 hours. Watch the lower-left region carefully at about the 2-second mark to see the powerful flare burst out. The energetic particles from that flare and associated CME are not expected to directly impact the Earth and trigger impressive auroras, but scientists will keep a close watch on this unusually active region over the next two weeks, as it faces the Earth, to see what develops.

"While it’s not officially summer yet, the town is coming to life. The lilacs and apple trees are blooming over the forget-me-nots, and over them all is the bright blue sky of the coming summer. For me, though, the clearest sign of the change of seasons is that Buddy is back on the water, and sunrise photos like this are waiting for me on my phone when I get up many hours after he has headed out to haul."
Photo and text shared by Heather Cox Richardson from Letters from an American

NASA Astronomy Picture of the Day:

Dark markings and bright nebulae in this telescopic southern sky view are telltale signs of young stars and active star formation. They lie a mere 650 light-years away, at the boundary of the local bubble and the Chamaeleon molecular cloud complex. Regions with young stars identified as dusty reflection nebulae from the 1946 Cederblad catalog include the C-shaped Ced 110 just above and right of center, and bluish Ced 111 below it. Also a standout in the frame, the orange tinted V-shape of the Chamaeleon Infrared Nebula (Cha IRN) was carved by material streaming from a newly formed low-mass star. The well-composed image spans 1.5 degrees. That's about 17 light-years at the estimated distance of the nearby Chamaeleon I molecular cloud.

Photo by Amiel Contuliano

Memorial Day honors all service members who lost their lives while in service to the United States, during peace and war. It is a time to reflect on those who made the ultimate sacrifice for our country.

            Immortality

   Do not stand 
        By my grave, and weep.
   I am not there,
       I do not sleep—
I am the thousand winds that blow
I am the diamond glints in snow
I am the sunlight on ripened grain,
I am the gentle, autumn rain.
As you awake with morning’s hush,
I am the swift, up-flinging rush
Of quiet birds in circling flight,
I am the day transcending night.
    Do not stand
        By my grave, and cry—
     I am not there,
          I did not die.

Poem by Clare Harner, The Gypsy, December 1934 (page 16). The poem is often attributed to anonymous or incorrect sources. Read more about Memorial day:  U.S. Department of Veterans Affairs   -   National Museum of American History

NASA Astronomy Picture of the Day:

What's happened to our Sun? Nothing very unusual -- it just threw a filament. Toward the middle of 2012, a long standing solar filament suddenly erupted into space, producing an energetic coronal mass ejection (CME). The filament had been held up for days by the Sun's ever changing magnetic field and the timing of the eruption was unexpected. Watched closely by the Sun-orbiting Solar Dynamics Observatory, the resulting explosion shot electrons and ions into the Solar System, some of which arrived at Earth three days later and impacted Earth's magnetosphere, causing visible auroras. Loops of plasma surrounding the active region can be seen above the erupting filament in the featured ultraviolet image. Our Sun is nearing the most active time in its 11-year cycle, creating many coronal holes that allow for the ejection of charged particles into space. As before, these charged particles can create auroras. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)

Deep inside,
this chest
of mine,
lies a shard,
of a
broken heart.
"Anguish becomes,
thee",
said no one.

State supreme court races have become pivotal in current legal battles over issues including abortion, elections, education, the environment and LGBTQ rights. With more than 80 state supreme court seats up for election this year in 33 states, voters have the potential to shape the future of their states for years to come. ......That is, if they actually get to choose who joins the court. More at The Conversation ➜

NASA Astronomy Picture of the Day:

Orbiting 400 kilometers above Quebec, Canada, planet Earth, the International Space Station Expedition 59 crew captured this snapshot of the broad St. Lawrence River and curiously circular Lake Manicouagan on April 11. Right of center, the ring-shaped lake is a modern reservoir within the eroded remnant of an ancient 100 kilometer diameter impact crater. The ancient crater is very conspicuous from orbit, a visible reminder that Earth is vulnerable to rocks from space. Over 200 million years old, the Manicouagan crater was likely caused by the impact of a rocky body about 5 kilometers in diameter. Currently, there is no known asteroid with a significant probability of impacting Earth in the next century. Each month, NASA’s Planetary Defense Coordination Office releases an update featuring the most recent figures on near-Earth object close approaches, and other facts about comets and asteroids that could pose a potential impact hazard with Earth.

NASA Astronomy Picture of the Day:

Star formation can be messy. To help find out just how messy, ESA's new Sun-orbiting Euclid telescope recently captured the most detailed image ever of the bright star forming region M78. Near the image center, M78 lies at a distance of only about 1,300 light-years away and has a main glowing core that spans about 5 light-years. The featured image was taken in both visible and infrared light. The purple tint in M78's center is caused by dark dust preferentially reflecting the blue light of hot, young stars. Complex dust lanes and filaments can be traced through this gorgeous and revealing skyscape. On the upper left is associated star forming region NGC 2071, while a third region of star formation is visible on the lower right. These nebulas are all part of the vast Orion Molecular Cloud Complex which can be found with even a small telescope just north of Orion's belt. More Euclid Sky Candy: Recent images released from Euclid

"Although service members know they may lose their lives in combat in service of their country, they may not expect to lose their lives – or those they love – to suicide. A 2021 study estimated that four times as many active duty service members and veterans died by suicide as died in battle since 9/11". More at The Conversation➜