Magazine Posts

NASA Astronomy Picture of the Day:

Where is Comet ATLAS going? In the featured time-lapse video, the comet is not itself moving very much, but the Earth's rotation makes it appear to be setting over a hill. The Comet C/2024 G3 (ATLAS) sequence was captured with an ordinary camera on January 22 from the Araucanía Region in central Chile. Comet ATLAS has been an impressive site in the evening skies of Earth's Southern Hemisphere over the past few weeks, so bright and awe-inspiring that it may eventually become known as the Great Comet of 2025. Unfortunately, Comet G3 ATLAS is not going anywhere anymore because its central nucleus broke up during its close pass to the Sun last month. Some of the comet's scattered remains of rocks and ice will continue to orbit the Sun, some in nearly the same outward section of the orbit that the comet's nucleus would have taken.

Video by Gabriel Muñoz

An 18th century horse mill at the Wieliczka Salt Mine, southern Poland.

Kriskros, CC BY-SA 3.0 pl, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

Yes, but can your rainbow do this? Late in the day, the Sun set as usual toward the west. However, on this day, the more interesting display was 180 degrees around -- toward the east. There, not only was a rainbow visible, but an impressive display of anticrepuscular rays from the rainbow's center. In the featured image from Lekeitio in northern Spain, the Sun is behind the camera. The rainbow resulted from sunlight reflecting back from falling rain. Anticrepuscular rays result from sunlight, blocked by some clouds, going all the way around the sky, overhead, and appearing to converge on the opposite horizon -- an optical illusion. Rainbows by themselves can be exciting to see, and anticrepuscular rays a rare treat, but capturing them both together is even more unusual -- and can look both serene and surreal. Jigsaw Challenge: Astronomy Puzzle of the Day

Photo by Julene Eiguren

Crested hawk-eagle (Nisaetus cirrhatus cirrhatus) with Indian garden lizard (Calotes versicolor) in Satpura National Park, Madhya Pradesh, India.

Charles J. Sharp, CC BY-SA 4.0, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

Some stars explode in slow motion. Rare, massive Wolf-Rayet stars are so tumultuous and hot that they are slowly disintegrating right before our telescopes. Glowing gas globs each typically over 30 times more massive than the Earth are being expelled by violent stellar winds. Wolf-Rayet star WR 124, visible near the featured image center and spanning six light years across, is thus creating the surrounding nebula known as M1-67. Details of why this star has been slowly blowing itself apart over the past 20,000 years remains a topic of research. WR 124 lies 15,000 light-years away towards the constellation of the Arrow (Sagitta). The fate of any given Wolf-Rayet star likely depends on how massive it is, but many are thought to end their lives with spectacular explosions such as supernovas or gamma-ray bursts. Explore Your Universe: Random APOD Generator

Northwest view of the church, castle and lake in Ivenack, Germany. The complex is part of the Ivenacker Tiergarten and Ivenacker Eichen nature reserves.

Radomianin, CC BY-SA 4.0, via Wikimedia Commons. View source.

"As nightfall does not come all at once, neither does oppression. In both Instances, there is a twilight when everything remains seemingly unchanged. And it is in such twilight that we all must be most aware of change in the air - however slight - lest we become unwitting victims of the darkness"

William Orville Douglas (1898 – 1980) was an American jurist who served as an associate justice of the Supreme Court of the United States for 36 years from 1939 to 1975. Douglas was known for his strong progressive and civil libertarian views and as a strong defender of the First Amendment. Born in Maine, Minnesota, Douglas moved west with his family to California and then to Yakima, Washington after the death of his father. He chaired  the Securities and Exchange Commission before being appointed to the Supreme Court by President Franklin D. Roosevelt. He is the longest-serving justice in history to date.

Quote source: The Douglas letters: Selections from the private papers of Justice William O. Douglas by William O. Douglas

NASA Astronomy Picture of the Day:

What's happening to Comet G3 ATLAS? After passing near the Sun in mid-January, the head of the comet has become dimmer and dimmer. By late January, Comet C/2024 G3 (ATLAS) had become a headless wonder -- even though it continued to show impressive tails after sunset in the skies of Earth's Southern Hemisphere. Pictured are images of Comet G3 ATLAS on successive January nights taken from Río Hurtado, Chile. Clearly, the comet's head is brighter and more centrally condensed on the earlier days (left) than on later days (right). A key reason is likely that the comet's nucleus of ice and rock, at the head's center, has fragmented. Comet G3 ATLAS passed well inside the orbit of planet Mercury when at its solar closest, a distance that where heat destroys many comets. Some of comet G3 ATLAS' scattering remains will continue to orbit the Sun. Gallery: Comet G3 ATLAS