iotman in #science • 4 days ago🌌 SpacePicture of a Day: Anticrepuscular Rays: A Rainbow Fan over Spain 🪐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 -- towardiotman in #science • 6 days ago🌌 SpacePicture of a Day: Comet G3 ATLAS Disintegrates 🪐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 becomeiotman in #science • 7 days ago🌌 SpacePicture of a Day: Nacreous Clouds over Sweden 🪐Vivid and lustrous, wafting iridescent waves of color wash across this skyscape from northern Sweden. Known as nacreous clouds or mother-of-pearl clouds, they are rare. But their unforgettabliotman in #science • 8 days ago🌌 SpacePicture of a Day: The Variable Nebula NGC 2261 🪐The interstellar cloud of dust and gas captured in this sharp telescopic snapshot is seen to change its appearance noticeably over periods as short as a few weeks. Discovered over 200 years aiotman in #science • 9 days ago🌌 SpacePicture of a Day: Hydrogen Clouds of M33 🪐Gorgeous spiral galaxy Messier 33 seems to have more than its fair share of glowing hydrogen gas. A prominent member of the local group of galaxies, M33 is also known as the…iotman in #science • 10 days ago🌌 SpacePicture of a Day: Dust Shells around WR 140 from Webb 🪐What are those strange rings? Rich in dust, the rings are likely 3D shells -- but how they were created remains a topic of research. Where they were created is well known: in a binariotman in #science • 11 days ago🌌 SpacePicture of a Day: Comet G3 ATLAS over Uruguay 🪐Comets can be huge. When far from the Sun, a comet's size usually refers to its hard nucleus of ice and rock, which typically spans a few kilometers -- smaller than even a small moon. When neiotman in #science • 12 days ago🌌 SpacePicture of a Day: Pleiades over Half Dome 🪐Stars come in bunches. The most famous bunch of stars on the sky is the Pleiades, a bright cluster that can be easily seen with the unaided eye. The Pleiades lies only about 450 light yearsiotman in #science • 13 days ago🌌 SpacePicture of a Day: The Many Tails of Comet G3 ATLAS 🪐Why does this comet have so many tails? C/2024 G3 (ATLAS) has developed several long and intricate tails visible from Earth's southern hemisphere over the past two weeks. Many observers reiotman in #science • 14 days ago🌌 SpacePicture of a Day: Stardust in the Perseus Molecular Cloud 🪐Clouds of stardust drift through this deep skyscape, across the Perseus molecular cloud some 850 light-years away. Dusty nebulae reflecting light from embedded young stars staniotman in #science • 15 days ago🌌 SpacePicture of a Day: Comet G3 ATLAS: a Tail and a Telescope 🪐Comet C/2024 G3 ATLAS has made a dramatic appearance in planet Earth's skies. A visitor from the distant Oort Cloud, the comet reached its perihelion on January 13. On January 19iotman in #science • 16 days ago🌌 SpacePicture of a Day: NGC 7814: Little Sombrero 🪐Point your telescope toward the high flying constellation Pegasus and you can find this cosmic expanse of Milky Way stars and distant galaxies. NGC 7814 is centered in the sharp field of view tiotman in #science • 17 days ago🌌 SpacePicture of a Day: The North America Nebula 🪐The North America nebula on the sky can do what the North America continent on Earth cannot -- form stars. Specifically, in analogy to the Earth-confined continent, the bright part that appears asiotman in #science • 18 days ago🌌 SpacePicture of a Day: Comet ATLAS over Brasília 🪐What's that in the sky? Above the city, above most clouds, far in the distance: it's a comet. Pictured, the impressive tail of Comet C/2024 G3 (ATLAS) was imaged from Brasília, Brazil four days agiotman in #science • last month🌌 SpacePicture of a Day: Supernova Remnants Big and Small 🪐What happens after a star explodes? A huge fireball of hot gas shoots out in all directions. When this gas slams into the existing interstellar medium, it heats up so much it glows. Two diotman in #science • last month🌌 SpacePicture of a Day: A New Year's Aurora and SAR Arc 🪐It was a new year, and the sky was doubly red. The new year meant that the Earth had returned to its usual place in its orbit on January 1, a place a few days before its closest approach to thiotman in #science • last month🌌 SpacePicture of a Day: Colliding Spiral Galaxies from Webb and Hubble 🪐Billions of years from now, only one of these two galaxies will remain. Until then, spiral galaxies NGC 2207 and IC 2163 will slowly pull each other apart, creati
