WhyCosmo

Saturn's awe-inspiring rings , the iconic celestial feature we've all admired, will vanish from view by March 2025 . This rare cosmic event, caused by Saturn's unique axial tilt , will hide the rings from Earth-based observers for months. The rings will reappear briefly in November 2025 before disappearing again for 29.5 years . Composed of ice particles, rocky debris, and cosmic dust, Saturn's rings offer a stunning spectacle that has fascinated astronomers for centuries. From Galileo Galilei's initial observation of the planet's "ears" to the cutting-edge research of modern astronomers like Dr. Lucy Jones from the Harvard-Smithsonian Center for Astrophysics, the mysteries of Saturn's rings continue to captivate us. Saturn's rings aren't just one solid structure—they are divided into several sections (A, B, and C rings) and separated by gaps like the Cassini Division, a 4,800 km-wide void shaped by Saturn's moons. These "shepherd...

 On the magical nights of August 12 and 13 , the skies above the historic 11th Century Corfe Castle in the UK witnessed a cosmic spectacle like no other! Photographer Josh Dury , who ventured out to capture the peak of the Perseid meteor shower, was gifted a breathtaking surprise. Not only did the Perseid meteors dazzle across the sky, but the Northern Lights and a rare SAR arc ( Stable Auroral Red ) made an unexpected appearance alongside the Andromeda and Triangulum galaxies. Perseid meteor shower, northern lights and rare SAR arc glow during the night of Aug.12/13.   (Image credit: Josh Dury) Dury's camera immortalized this once-in-a-lifetime celestial phenomenon. "I had no idea the Northern Lights would show up. The sky lit up in an extraordinary play of colors, with meteors, auroras, and even a rare SAR arc visible only by the camera," Dury exclaimed. The SAR arc, a deep red glow in the upper atmosphere, is often too faint for the human eye to catch, adding even ...

 Stargazers may witness a rare celestial event this summer—a " new star " appearing in the night sky! Though it may look like a new star, it's a spectacular cosmic explosion, known as a nova , set to occur in Corona Borealis . This fascinating event occurs approximately 3,000 light-years away , involving a white dwarf and a red giant star in a binary star system known as T Coronae Borealis , or T CrB . About 3,000 light-years away, a white-dwarf star (illustrated, left) pulls material off a nearby red-giant star (right). The buildup of matter on the white dwarf can trigger a nova eruption bright enough to see from Earth.  M. Weiss, CXC/NASA Share thi Every 80 years, this white dwarf pulls enough matter from its red giant companion to trigger a nova eruption. The last one happened in 1946; now, astronomers predict another eruption is due this September. If the nova occurs, it will be visible to the naked eye for a few days to a week—a once-in-a-lifetime opportunity! The ...

  The Gemini North telescope in Hawaii has captured a mesmerizing cosmic spectacle, revealing the stunning beauty of a dying star. This week's space photo unveils Kohoutek 3-46 , a planetary nebula located 7,200 light-years away in Cygnus's constellation . Kohoutek 3-46 is a planetary nebula captured by the Geminin North telescope.   (Image credit: International Gemini Observatory/NOIRLab/NSF/AURA. Image processing: J. Miller (International Gemini Observatory/NSF's NOIRLab), M. Rodriguez (International Gemini Observatory/NSF's NOIRLab) & M. Zamani (NSF's NOIRLab)) As stars like our sun near the end of their lives, they undergo a breathtaking transformation. For smaller stars, about one to eight times the size of the sun, this process involves expanding into a red giant before shedding their outer layers. These glowing gas layers, illuminated by the remaining core or white dwarf, can create intricate shapes that shine for thousands of years. Kohoutek 3-46, es...

  Asteroid 2024 MK to Soar Between Earth and Moon on Saturday This Saturday, June 29 , prepare for a celestial spectacle as the massive asteroid 2024 MK flies past Earth. Discovered just two weeks ago by astronomers in South Africa, this asteroid is more giant than the Great Pyramid of Giza, measuring around 480 feet (146 meters) across. At its closest approach, it will be approximately 184,000 miles (295,000 kilometers) from our planet, about three-quarters the distance to the moon. The potentially hazardous asteroid 2024 MK will sail between Earth and the moon on Saturday.   (Image credit: JUAN GARTNER via Getty Images) Exciting Details: Speed: The asteroid will be traveling at a staggering speed of 21,000 mph (34,000 km/h). No Threat: While it poses no danger to Earth, NASA classifies 2024 MK as a "potentially hazardous asteroid" due to its size and orbit. Future Return: After this close encounter, 2024 MK will return to the asteroid belt and won't return until 20...

 Auroras (the northern and southern lights) are visible from the ground after powerful solar storms, but these natural light shows look even more majestic from above. Here are 24 spectacular photos of auroras taken from space. 1. View of the Southern Lights from Challenger  A green aurora slices through the Southern Hemisphere between Antarctica and Australia. This vintage shot of the southern lights was captured in April 1985 by astronaut Robert F. Overmyer aboard the space shuttle Challenger. (Image credit: NASA / Robert F. Overmyer) 2. Aurora over Moscow The northern lights swoop beneath a full moon as Moscow glows like a golden spider on the left of the frame. This photo was taken in April 2014 by an Expedition 39 crewmember aboard the International Space Station (ISS). (Image credit: NASA / Rick Mastracchio) 3. A World-Eating Serpent A vivid-green, nearly round aurora curls over the Southern Hemisphere like an enormous serpent. This exquisite photo was taken with NASA's I...