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Astronomy
Astronomy
October 9, 2025
Oct. 9, 1873: The birth of Karl Schwarzschild
Today in the history of astronomy, the man who lays the foundation for our understanding of black holes is born.
Astronomy
October 8, 2025
Oct. 8, 1873: The birth of Ejnar Hertzsprung
Today in the history of astronomy, a pioneer in star classification is born.
Astronomy
October 7, 2025
Oct. 7, 1959: The first photos of the Moon’s farside are taken.
Today in the history of astronomy, the Soviets are the first behind the Moon.
Astronomy
October 7, 2025
Deep-Sky Objects
Deep-sky objects are celestial objects that exist outside our solar system. Three major types of deep-sky objects are nebulae, star clusters...
Astronomy
October 7, 2025
Observing Basics
Having trouble finding your way around the sky? Curious what that celestial object is? Here's what you need to know to get outside and start...
Astronomy
October 7, 2025
Astrophotography
Photographing the night sky can be an intimidating task. But by following a few simple tips, you can start capturing your own stunning astro...
Astronomy
October 6, 2025
2025 Full Moon calendar: When to see the Full Moon and phases
The next Full Moon is the October Hunter's Moon, which occurs at 11:48 p.m. on Monday, Oct. 6, 2025. It is also a Super Moon and the Harvest...
Astronomy
October 6, 2025
Oct. 6, 2010: Chang-e 2 arrives at the Moon
Today in the history of astronomy, China’s Moon-mapping spacecraft begins its orbit.
Astronomy
October 6, 2025
The Moon
The Moon is Earth's only natural satellite. Whether enjoying a lunar eclipse or observing the Moon's surface, it has many fascinating featur...
Astronomy
October 5, 2025
Oct. 5th, 1923: Hubble discovers galaxies beyond the Milky Way
Today in the history of astronomy, Edwin Hubble’s identification of Cepheids in M31 reveals the massive scale of the universe.
Astronomy
October 5, 2025
Today in the History of Astronomy
Today in the History of Astronomy
Astronomy
October 4, 2025
Oct. 4th, 1957: Sputnik launches
Today in the history of astronomy, the first artificial satellite kicks off the Space Race.
Astronomy
October 3, 2025
Michael’s Miscellany: Observe the Veil Nebula
This magnificent complex is high overhead right now.
Astronomy
October 3, 2025
Why NASA is targeting the Moon’s south pole for Artemis
The world’s spacefaring nations are all eyeing the Moon’s south pole, seeking water, rare metals, and answers about our satellite’s history.
Astronomy
October 3, 2025
Oct. 3, 1942: The V-2 successfully launches
Today in the history of astronomy, the rockets that will reach space have arrived.
Astronomy
October 3, 2025
The Sky This Week from Oct. 3 to 10: Titan’s last shadow transit
Titan and its shadow cross Saturn one last time together, while Io and Europa overlap at Jupiter and a Full Harvest Super Moon hangs in the...
Astronomy
October 2, 2025
Michael’s Miscellany: More observing tips
A few things to consider when you’re out under the stars.
Astronomy
October 2, 2025
Oct. 2, 480 B.C.E.: An eclipse causes a retreat
Today in the history of astronomy, a solar eclipse darkens skies ominously over ancient Greece.
Astronomy
October 2, 2025
Celebrate 100 years of planetariums this week with the IAU
Astronomical societies are teaming up this week to celebrate 100 years since the invention of the modern planetarium. Here’s how you can be...
Astronomy
October 1, 2025
Michael’s Miscellany: Satellite trails
If you don’t think they’re a problem, take a look at this image.
Astronomy
October 1, 2025
Scientists confirm existence of organic molecules on Enceladus
Explore the discovery of organic molecules in Saturn's rings by Cassini, suggesting possible life in Enceladus' ocean.
Astronomy
October 1, 2025
Oct. 1, 1847: Miss Mitchell’s Comet
Today in the history of astronomy, Maria Mitchell becomes the first American to discover a comet.
Astronomy
October 1, 2025
October 2025: What's in the sky this month?
Mercury and Mars meet in the evening, Titan transits Saturn twice, and the Orionid meteor shower dazzles during October.
Astronomy
September 30, 2025
NASA is planning a $30 million Swift Observatory rescue mission
Swift Observatory rescue mission aims to boost the spacecraft's orbit, potentially redefining satellite servicing.
Astronomy
September 30, 2025
Government shutdown threatens NASA's future
Amid a looming government shutdown, the NASA funding crisis underscores the agency's critical financial challenges and uncertain future.
Astronomy
September 30, 2025
Could asteroids near Venus pose a threat to Earth?
More observations are needed to reveal these “invisible” objects.
Astronomy
September 30, 2025
Sept. 30, 1880: Henry and Anna Draper photograph M42
Today in the history of astronomy, the Drapers capture the first image of the Great Nebula in Orion.
Astronomy
September 29, 2025
JWST peers into the Crystal Ball Nebula to unveil a stellar finale
A tight-knit binary system sculpts intricate details in planetary nebula NGC 1514 as these suns approach the end of their lives.
Astronomy
September 29, 2025
Did a hit-and-run shape Mercury's strange core?
Explore Mercury formation theories and uncover insights into whether a cosmic hit-and-run shaped the planet's unique composition.
Astronomy
September 29, 2025
Sept. 29, 2022: Seeing the DART impact
Today in the history of astronomy, Hubble’s images of DART hitting Dimorphos are released.
Astronomy
September 28, 2025
Sept. 28, 1969: The Murchison Meteorite explodes over Australia
Today in the history of astronomy, a rare and ancient meteorite brings a wealth of scientific discoveries.
Astronomy
September 27, 2025
Sept. 27, 1918: The birth of Martin Ryle
Today in the history of astronomy, a pioneer of radio astronomy is born.
Astronomy
September 27, 2025
This Week in Astronomy
This Week in Astronomy
Astronomy
September 26, 2025
Ancient tektites uncover massive asteroid impact
Ancient Australian tektites uncover a giant asteroid impact, revealing an immense, unseen crater.
Astronomy
September 26, 2025
Michael’s Miscellany: Observe the Coathanger
Early autumn is a great time to hunt down this famous asterism.
Astronomy
September 26, 2025
Sept. 26, 2005: Cassini visits Saturn’s weirdest moon
Today in the history of astronomy, we get our first close-up look at potato-shaped Hyperion.
Astronomy
September 26, 2025
The Sky This Week from Sept. 26 to Oct. 3: See the zodiacal light
The First Quarter Moon shows off its features as Ceres reaches opposition and the Orion Nebula and zodiacal light shine in the sky this week...
Astronomy
September 25, 2025
Planetary scientists find a seasonal ozone layer on Mars
This atmospheric barrier may have protected early life on the Red Planet.
Astronomy
September 25, 2025
Sept. 25, 1644: The birth of Ole Roemer
Today in the history of astronomy, the first person to measure the speed of light is born.
Astronomy
September 24, 2025
Why plate tectonics could be key to alien civilizations
Discover the link between plate tectonics and alien life, exploring how this rare phenomenon could influence extraterrestrial existence in o...
Astronomy
September 24, 2025
Michael’s Miscellany: Historical observing
Using an astronomy icon’s mirror under a pristine sky.
Astronomy
September 24, 2025
Sept. 24, 1970: Luna 16 brings back regolith
Today in the history of astronomy, the first robotically gathered lunar samples are returned to Earth.
Astronomy
September 24, 2025
Remote imaging can transform your astrophotos: How to get started
Setting up a remote observatory allows you to observe under clear skies and take astrophotos from the comfort of your home.
Astronomy
September 23, 2025
JWST discovers new features in Saturn’s atmosphere
Scientists have found strange new patterns within the ringed planet’s atmosphere, including beads and stars.
Astronomy
September 23, 2025
Tour the sky's best globular clusters
They’re more than just spherical collections of stars — these ancient clusters are some of the most popular amateur astronomy targets.
Astronomy
September 23, 2025
Sept. 23, 1846: Johann Galle discovers Neptune
Today in the history of astronomy, Neptune becomes the first planet discovered based on mathematical predictions.
Astronomy
September 22, 2025
This Week in Astronomy with Dave Eicher: The Dumbbell Nebula
One of the sky’s finest planetary nebulae is on view right now.
Astronomy
September 22, 2025
Sept. 22, 1791: The birth of Michael Farraday
Today in the history of astronomy, a physicist who will shape our understanding of electromagnetism is born.
Astronomy
September 22, 2025
Sept. 22, 1791: The birth of Michael Farraday
Today in the history of astronomy, a physicist who will shape our understanding of electromagnetism is born.
Astronomy
September 21, 2025