On Oct. 4th, 1957, at 10:29 PM Moscow time, the Soviet Union successfully launched Sputnik 1 into space on a repurposed R-7 rocket. The world’s first artificial satellite, Sputnik was about 22 inches (58 centimeters) in diameter and weighed 184 pounds (84 kilograms). Although there were no scientific instruments aboard, the transmitter it carried sentContinue reading “Oct. 4th, 1957: Sputnik launches”
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An engineering model of NASA’s DAVINCI (Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging) descent probe passed a key test that ran from Aug. 28 to Sept. 10, showing it can survive the extreme temperatures of Venus.
Read MoreA 12-ton rocket loaded with a 1-ton warhead, the V-2’s successful launch would prove to be exceptionally significant to both the military and to space exploration. On Oct. 3, 1942, the V-2 was fired from Peenemunde, Germany – its fourth test, and the first to succeed. The rocket rose to an altitude of 60 milesContinue reading “Oct. 3, 1942: The V-2 successfully launches”
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Read MoreIf a train leaves the station in Exeter, England, headed south toward Newton Abbot five years before the railway line opens, how long until anyone figures out that it didn’t happen? Well, evidently about 155 years. A report on magnetic storms, published in Nature in 1871, described an incident thought to be the earliest recordedContinue reading “Case closed on long-standing space weather mystery”
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A SpaceX Falcon 9 rocket carrying the company’s Dragon spacecraft is launched on NASA’s SpaceX Crew-13 mission to the International Space Station with NASA astronauts Jessica Watkins and Luke Delaney, CSA (Canadian Space Agency) astronaut Joshua Kutryk, and Roscosmos cosmonaut Sergey Teteryatnikov aboard, Thursday, Oct. 1, 2026, from Cape Canaveral Space Force Station in Florida.
Read MoreMake sure to set your alarm clock early on the morning of Tuesday, Oct. 6, so that you won’t miss a rare and spectacular celestial event. The brilliant planet Jupiter and its retinue of Galilean satellites will pass behind the waning Moon, a 20%-illuminated crescent just 4¼ days before New. Astronomers call this phenomenon anContinue reading “See the Moon occult Jupiter October 6”
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This long-duration image shows star trails above Earth and the blue lights of fishing boats and the yellow lights of Indonesian cities stretching below the International Space Station as it orbited 258 miles above the Banda Sea.
Read MoreMission Highlight: Starship Flight 14 After 13 previous suborbital test flights, Starship finally reached orbit on test flight 14. SpaceX’s launch window opened at 8:15 a.m. EDT on Monday, Sept. 28, and the rocket cleared the tower at Starbase, Texas, at 8:48 a.m. EDT. Just over three hours later, the flight ended in a fireballContinue reading “Starship reaches orbit on 14th test flight”
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Ahead of launch of NASA’s SpaceX Crew-13 mission, a SpaceX Falcon 9 rocket, with the Dragon spacecraft atop, is vertical at the launch pad of Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida on Sunday, Sept. 27, 2026.
Read MoreThe Edge of Space-Time: Particles, Poetry, and the Cosmic Dream Boogie The Knopf Doubleday Publishing GroupNew York, New York In The Edge of Space-Time: Particles, Poetry, and the Cosmic Dream Boogie, Chanda Prescod-Weinstein — professor of physics at the University of New Hampshire and the first Black woman to earn tenure in theoretical cosmology —Continue reading “New astronomy products to fall for this month”
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This nighttime view of the United States, dotted with city lights looking toward New York City (center), was taken at approximately 3:40 a.m. local time from the International Space Station as it orbited 259 miles above Earth.
Read MoreAt 10:58 AM on Sept. 28, 1969, residents of the small Australian farming community of Murchison, Victoria, heard a series of loud booms. The noise was accompanied by a strong smell and a streak of smoke in the sky. A carbonaceous chondite meteorite, the Murchison Meteorite broke up as it entered the atmosphere, and thusContinue reading “Sept. 28, 1969: The Murchison Meteorite explodes over Australia”
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Read MoreBorn Sept. 27, 1918, and educated at Bradfield College and Oxford University in the U.K., Martin Ryle would go on to be the first astronomer royal (1972-1982) with a background in radio astronomy. During World War II, Ryle worked in radio systems and countermeasures for the RAF. He was strongly antiwar, though, and had noContinue reading “Sept. 27, 1918: The birth of Martin Ryle”
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NASA astronaut and commander of the agency’s Artemis II mission, Reid Wiseman, a Baltimore native, takes a selfie with fans at an NFL game between the New Orleans Saints and the Baltimore Ravens at M&T Bank Stadium, Sunday, Sept. 20, 2026, in Baltimore.
Read MoreResembling a lumpy chunk of coral floating through space, Hyperion is one of the weirdest moons not just of Saturn, but in the whole solar system. Its shape is irregular, its rotation is chaotic, and it looks oddly spongelike. On Sept. 26, 2005, Cassini completed its first flyby of this bizarre moon, giving NASA bothContinue reading “Sept. 26, 2005: Cassini visits Saturn’s weirdest moon”
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Though the spiral galaxy in this ESA/Hubble Picture of the Month seems serene, it hides a chaotic secret.
Read MoreThe Full Moon closest to the autumnal equinox hides an added bonus: more moonlight for your money.
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An Alta-X drone flies an advanced guidance and navigation system known as the Safe and Precise Landing – Integrated Capabilities Evolution (SPLICE) experiment near NASA’s Armstrong Flight Research Center in Edwards, California, on Thursday, Aug. 27, 2026.
Read MoreOn Sept. 24, 1970, Luna 16 blazed a new trail in lunar sample collection – one traversed by robots. Although the Apollo astronauts had collected lunar samples on their missions, Luna 16 was the first instance of samples being gathered and returned to Earth fully robotically, with no astronauts (or cosmonauts) involved. After blasting offContinue reading “Sept. 24, 1970: Luna 16 brings back regolith”
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An image from NASA’s Hubble Space Telescope of galaxy cluster MACS J0417 is part of repeated observations to monitor for the reappearance of supernova Athena, which can help astronomers measure the expansion rate of the universe.
Read MoreLooking for a sky event this week? Check out our full Sky This Week column. September 22: The autumnal equinox The bright Moon stands prominently in Aquarius the Water-bearer this evening, quickly waxing toward Full. Swing your scope up toward Earth’s lone satellite tonight and focus in on a point just east of the terminator dividing nightContinue reading “The Sky Today on Wednesday, September 23: Around Reiner Gamma”
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Using NASA’s Chandra X-ray Observatory, scientists have discovered a new class of objects behaving unlike any they have seen before.
Read MoreRiccardo Maffioli from Albizzate, Varese, Italy The Soap Bubble Nebula (PN G75.5+1.7 or PN Ju 1), a little-studied planetary nebula in Cygnus near the better-known Crescent Nebula, is the shell cast off by a dying Sun-like star. Its near-perfect sphere, roughly 4′ across was only discovered in 2008; its faintness and position against other emissionContinue reading “A bubble adrift”
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Read MoreLooking for a sky event this week? Check out our full Sky This Week column. September 20: Juno’s movement Rising around 7:30 P.M. local daylight time, Saturn reaches an altitude above 40° in the southeast by local midnight. Visible to the naked eye, it is the brightest point of light in this region of the sky, sittingContinue reading “The Sky Today on Monday, September 21: Saturn passes a field star”
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Read MoreLooking for a sky event this week? Check out our full Sky This Week column. September 19: Mars meets Pollux Now is the best time to catch 145-mile-wide 3 Juno as it passes through a random collection of 9th- and 10th-magnitude stars. Now located in far southern Aquila near its border with Sagittarius, Juno glows at magnitude 9.6.Continue reading “The Sky Today on Sunday, September 20: Juno’s movement”
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UC Berkeley engineers and managers watch as the COSI (Compton Spectrometer and Imager) detector assembly is slowly raised from a table in this July 8, 2026, image.
Read MoreLooking for a sky event this week? Check out our full Sky This Week column. September 18: The Lizard’s brightest cluster Mars passed 6° due south of Pollux in Gemini at midnight on the 18th, and they now rise together in the early-morning sky. An hour before sunrise, the heads of Gemini have reached an altitude ofContinue reading “The Sky Today on Saturday, September 19: Mars meets Pollux”
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The rollout ceremony for NASA’s first space shuttle, OV-101, coincided with Constitution Day of the nation’s bicentennial on Sept.17, 1976. Although the orbiter was originally planned to be named Constitution, Star Trek fans successfully convinced President Gerald Ford to name it Enterprise after the series’ fictional starship.
Read MoreFriday, September 18First Quarter Moon occurs at 4:44 P.M. EDT. The Moon then reaches apogee, the farthest point from Earth in its orbit, at 11 P.M. EDT. At that time, our satellite will be 251,171 miles (404,221 kilometers) away. Venus reaches greatest brilliancy at 9 P.M. EDT, shining at magnitude –4.8. It’s bright and easyContinue reading “The Sky This Week from September 18 to 25: Autumn begins”
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Anak Krakatau erupts ash and volcanic gases in this image acquired with the OLI (Operational Land Imager) on Landsat 8 on Sept. 5, 2026.
Read MoreToday I’ll be telling you about 10 of my favorite autumn deep-sky objects, with suggestions for viewing them. I hope you’ll enjoy this list, and I’ll share some other deep-sky favorites of mine from time to time in the future. What’s a large telescope? The notion of what’s big changes from observer to observer, butContinue reading “Autumn observing targets for large telescopes”
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NASA astronaut Randy Bresnik (left) and ESA (European Space Agency) astronaut Luca Parmitano view progress on the solid rocket booster integration in High Bay 3 inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on Wednesday, Sept. 2, 2026.
Read MoreIn a groundbreaking announcement, the U.S. Space Force stated publicly on Monday, Sept. 14, that it currently has on-orbit weapons in space. Department of the Air Force Secretary Troy Meink’s keynote address at the 2026 Air and Space Cyber Conference focused on plans to modernize the Air Force against AI-powered weapons and capabilities wielded byContinue reading “U.S. confirms it has weapons in orbit”
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Fans pose for a photo with an astronaut in the NASA Experience Zone at an NFL game between the Pittsburgh Steelers and the Atlanta Falcons at Acrisure Stadium, Sunday, Sept. 13, 2026, in Pittsburgh, Pennsylvania.
Read MoreRocket launches this week On Monday, Sept. 14 at 9:21 p.m. EST, Avio — a publicly traded Italian aerospace company headquartered near Rome — is set to launch a Vega C rocket from the Guiana Space Centre in French Guiana, carrying two Earth-observation satellites for the European Space Agency (ESA). The first, Sentinel-3C, is theContinue reading “Europe launches two Earth-observation satellites amidst a busy week for China”
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Read MoreA joint NASA-ESA mission, the Ulysses solar probe launched Oct. 6, 1990, from the Space Shuttle Discovery. The mission was tasked with studying the solar wind, mapping the heliosphere, and becoming the first craft to study and chart the solar poles in detail. Equipped with a magnetometer, ion composition gauge, and instruments to measure radioContinue reading “Sept. 13, 1994: Ulysses at the Sun’s south pole”
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Read MoreLess than two years after the successful launch of Sputnik 1, the Soviet Union put a spacecraft on the Moon. Launched Sept. 12, 1959, Luna 2 traveled over 30 hours to crash-land on the lunar surface. The impact happened at a speed of about 1.9 miles (3 kilometers) per second, and represented the first contactContinue reading “Sept. 12, 1959: Luna 2 launches”
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Galaxies are like cosmic gems, each with characteristics including size and shape that make them distinct. A gallery from NASA’s Chandra X-ray Observatory and other telescopes displays a collection of galactic images that showcase this variety.
Read MoreLaunched as the International Sun-Earth Explorer-3 in 1978, a joint NASA-ESA mission, the ISEE-3 probe studied the solar wind and Earth’s magnetic field from the L1 Lagrange point. When its mission was complete in 1981, NASA proposed repurposing the craft by using it to intercept a comet; such reuse would save the money and timeContinue reading “Sept. 11, 1985: The ICE probe encounters Comet Giacobini-Zinner”
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Using the James Webb Space Telescope, an international team of astronomers have discovered that dust and water can form and survive surprisingly close to the supermassive black hole at the center of our Milky Way galaxy.
Read MoreTENERIFE, Canary Islands, Sept. 8, 2026 — Fifteen years after STARMUS brought together the legends who defined the first age of human space exploration, the Festival will welcome the explorers who have opened its newest chapter. Artemis II Commander Reid Wiseman, Pilot Victor Glover and Mission Specialist Jeremy Hansen will attend STARMUS VIII — TheContinue reading “Artemis 2 crew lands at Starmus VII — 15 years after Armstrong, Aldrin, and Leonov launched its lengacy”
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The crew of NASA’s Artemis II mission visited NASA’s Marshall Space Flight Center in Huntsville, Alabama on Sept. 1, 2026.
Read MoreThe phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This alignment ensures the entire side of the Moon that faces us gleams under sunlight. Thanks to the Moon’s orbit around Earth, the angle of sunlight hitting the lunar surface and being reflected back toContinue reading “2026 Full Moon calendar: When to see the Full Moon and phases”
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Read MoreRocket launches this week On Thursday, Sept. 10 at 5:00 a.m. EST, a Long March 2D rocket is set to lift off from Jiuquan Satellite Launch Center in northern China’s Gobi Desert carrying an undisclosed payload, according to tracking from Next Spaceflight. The rocket is operated by the state-owned space contractor China Aerospace Science andContinue reading “SpaceX closes out SES’s O3b mPower constellation”
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N44 is a complex nebula filled with glowing hydrogen gas, dark lanes of dust, massive stars, and many populations of stars of different ages. One of its most distinctive features, however, is the dark, starry gap called a “superbubble,” visible in this Hubble Space Telescope image in the upper central region.
Read MoreJames Van Allen, who was born in Iowa on Sept. 7, 1914, showed talent and interest in science and math from an early age. A major in physics from Wesleyan College in 1935 was followed by a Ph.D. in nuclear physics in 1939. Before and after World War II – during which he developed antiaircraftContinue reading “Sept. 7, 1914: The birth of James Van Allen”
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Read MoreThe fall of 1618 was a standout when it came to notable comets, boasting three visible to the naked eye. In late August, C/1618 Q1 appeared, first spotted in the skies over Hungary. Johannes Kepler observed the comet throughout the month of September, spotting it from Linz, Austria, through a small telescope on Sept. 6.Continue reading “Sept. 6, 1618: The first comet seen through a telescope”
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Read MoreNASA’s Chandra X-Ray Observatory is the agency’s flagship mission for X-ray astronomy. On Sept. 5, 2001, NASA announced that astronomers using Chandra in October of the previous year had witnessed a fast, strong X-ray flare coming from the supermassive black hole at the center of our galaxy. This black hole, named Sagittarius A* (Sgr A*)Continue reading “Sept. 5, 2001: The Milky Way has a black hole”
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On Wednesday, June 17, skywatchers across the United States—and parts of Canada—enjoyed a rare event: a daytime lunar occultation of Venus. A lunar occultation occurs when the Moon moves directly in front of another celestial object from our viewpoint on Earth, briefly hiding it from sight.
Read MoreMark Johnston from Scottsdale, Arizona On Aug. 21, 2026, an unusually long-lasting M-class flare erupted from a sunspot group near the Sun’s west limb. As the flare’s stretched magnetic field lines reconnected and relaxed, they filled with hot plasma that cooled and drained along the loops, producing the glowing arcade seen here in Hydrogen-alpha (Hα)Continue reading “The aftermath of a solar flare”
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