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Astronomy
April 21, 2026
April 21, 1994: The discovery of exoplanets
Today in the history of astronomy, the first planets outside our solar system are confirmed.
Astronomy
April 21, 2026
April 20, 2025: Visiting Asteroid Donaldjohanson
On April 20, 2025, a historic space exploration milestone occurs as scientists and space agencies prepare to study the asteroid Donaldjohans...
Astronomy
April 17, 2026
JWST uncovers the Lobster Nebula's firestorm of starbirth
The James Webb Space Telescope recently peered into the massive young cluster Pismis 24 at the core of the Lobster Nebula.
Astronomy
April 17, 2026
First confirmed speakers for Starmus VIII
AI "godfather" and Nobel laureate Geoffrey Hinton, together with Brian May, listed as first confirmed speakers for STARMUS VIII.
Astronomy
April 16, 2026
R Aquarii in X-ray and optical light: A strange relationship
This composite image shows the twisted, close relationship shared by the stars at the heart of the R Aquarii system.
Astronomy
April 16, 2026
April 16, 1972: Apollo 16 launches
Today in the history of astronomy, Apollo 16 sets off for the Moon.
Astronomy
April 16, 2026
April 16, 1972: Apollo 16 launches
Today in the history of astronomy, Apollo 16 sets off for the Moon.
Astronomy
April 16, 2026
Today in the History of Astronomy
Today in the History of Astronomy
Astronomy
April 15, 2026
April 15, 1452: The birth of Leonardo da Vinci
Today in the history of astronomy, the great Renaissance genius is born.
Astronomy
April 14, 2026
A palace on the Moon
Tianyao Yang meticulously planned this composite shot of the Tiangong space station transiting September 2025's lunar eclipse.
Astronomy
April 14, 2026
How to set up a public observing event
Now’s the time to share your love of the sky with others. Here are some expert tips on hosting your own observing event.
Astronomy
April 14, 2026
April 14, 1629: The birth of Christaan Huygens
Today in the history of astronomy, the discoverer of Titan – and much more – is born.
Astronomy
April 13, 2026
See spring’s best galaxies
Galaxy season is here! Dave Eicher highlights the best spring galaxies in Leo, Ursa Major, Coma Berenices, and Virgo — some visible even in...
Astronomy
April 13, 2026
With renewed interest in going to the Moon, how will future trash be dealt with?
Organizations are looking at the problem through three different lenses: preservation, mitigation, and recycling.
Astronomy
April 13, 2026
With renewed interest in going to the Moon, how will future trash be dealt with?
Organizations are looking at the problem through three different lenses: preservation, mitigation, and recycling.
Astronomy
April 13, 2026
April 13, 1941: The death of Annie Jump Cannon
Today in the history of astronomy, the great classifier of stars passes away.
Astronomy
April 12, 2026
April 12, 1981: Columbia lifts off for the first space shuttle mission
Today in the history of astronomy, the era of the space shuttle begins.
Astronomy
April 12, 2026
April 12, 1981: Columbia lifts of for the first space shuttle mission
Today in the history of astronomy, the era of the space shuttle begins.
Astronomy
April 11, 2026
April 11, 1970: Apollo 13 blasts off for the Moon
Today in the history of astronomy, the 'successful failure' mission launches.
Astronomy
April 10, 2026
April 10, 2019: First look at a black hole
Today in the history of astronomy, the first-ever photo of a black hole is released.
Astronomy
April 10, 2026
Artemis 2's heat shield: What to expect on NASA Moon mission’s critical final day
The Integrity spacecraft will need to nail its reentry into Earth’s atmosphere to cap strain on its heat shield.
Astronomy
April 9, 2026
How to watch the Artemis 2 splashdown
Four astronauts return from the Moon Friday. Here's how to watch them come home.
Astronomy
April 9, 2026
How the Artemis crew are protected from radiation and solar storms
NASA mitigates radiation risks with AI-driven space weather forecasting, a solar ‘storm shelter,’ and even a set of eyes on Mars.
Astronomy
April 9, 2026
April 9, 1959: The Mercury 7 debut
Today in the history of astronomy, NASA introduces its first astronauts.
Astronomy
April 8, 2026
April 8, 1960: Frank Drake begins Project Ozma
Today in the history of astronomy, a key SETI project conducts its first research.
Astronomy
April 7, 2026
Decades after Apollo 8, Jim Lovell's voice returns to the Moon
Jim Lovell first flew to the Moon in 1968. Fifty-eight years later, his voice made the trip one more time as part of a special message for t...
Astronomy
April 7, 2026
The stunning photos from Artemis 2's flyby of the Moon
The Artemis 2 crew spent seven hours observing the Moon and a total solar eclipse. Here is what they saw.
Astronomy
April 7, 2026
April 7, 1991: Compton Gamma Ray Observatory is deployed
Today in the history of astronomy, the second of NASA’s four great observatories makes its debut.
Astronomy
April 7, 2026
Where is Carroll Crater? Artemis 2 names crater after commander's late wife
The crew was overcome with emotion as they nominated the name Carroll for a crater "in a bright spot on the Moon."
Astronomy
April 6, 2026
Artemis 2 astronauts fly around moon — and farther than any human
Crew begins a seven-hour lunar observation as NASA returns to the moon’s neighborhood for the first time in decades.
Astronomy
April 6, 2026
As it happened: Artemis 2 flies past Moon, sees a total eclipse
Follow along for live updates as Artemis 2 makes the closest approach to the Moon.
Astronomy
April 6, 2026
How to track Artemis 2 in real time
NASA's AROW tool lets you follow the Orion spacecraft's every move — including tonight's historic lunar flyby, the first by humans since 197...
Astronomy
April 6, 2026
Could this telescope find life on alien worlds?
categories:Alien Life | tags:Alien Life, Exoplanets, Magazine, News
Astronomy
April 6, 2026
How long do planetary nebulae last?
On average, a planetary nebula should remain visible for some 25,000 years before its shell of gas becomes invisible.
Astronomy
April 6, 2026
2026 Full Moon calendar: When to see the Full Moon and phases
The next Full Moon of 2026 is the May Flower Moon, which will occur at 1:23 p.m. EDT on Friday, May 1.
Astronomy
April 6, 2026
April 6, 2000: A comet tail surprise
categories:Robotic Spaceflight, Today in the History of Astronomy | tags:Comets, News, Robotic Spaceflight
Astronomy
April 5, 2026
How Artemis 2's Easter message echoes Apollo history
There are several parallels between Apollo 8 in 1968 and Artemis 2 in 2026.
Astronomy
April 5, 2026
‘Good gracious!’ Artemis 2 nears the Moon and glimpses its farside
The four crew members are closer to Luna than to our home world, right on course, and viewing parts of the Moon never before seen by humans.
Astronomy
April 5, 2026
April 5, 1973: Pioneer 11 launches
Today in the history of astronomy, a mission to explore the outer planets begins.
Astronomy
April 4, 2026
April 4, 1807: The death of Jerome de Lalande
Today in the history of astronomy, an astronomer, author, and teacher passes away.
Astronomy
April 3, 2026
Artemis 2 snaps a ‘Blue Marble’ for our times
Reid Wiseman captures a striking view of Earth after the crew's translunar injection burn sets them on course for the Moon
Astronomy
April 3, 2026
NASA Artemis 2 astronauts leave Earth for the Moon
Translunar injection (TLI) burn puts the Integrity Orion spacecraft on course for lunar orbit.
Astronomy
April 2, 2026
Artemis Orion spacecraft passes docking demo with flying colors
One of Artemis 2's first major milestones came early, as the crew flew the Orion craft manually to test its maneuverability in simulated doc...
Astronomy
April 2, 2026
Liftoff! Artemis 2 astronauts begin historic Moon mission
Crew starts journey that will take it farther from Earth than any human has ventured.
Astronomy
April 2, 2026
April 2, 1845: The first photo of the Sun
Today in the history of astronomy, two French physicists capture a daguerreotype of our star.
Astronomy
April 1, 2026
Artemis 2 launch coverage: As it happened
For the first time in over half a century, humans have launched to the Moon. Follow the latest in our live launch coverage.
Astronomy
April 1, 2026
Artemis 2’s long countdown
A space historian explains why it has taken over 50 years to return to the Moon.
Astronomy
April 1, 2026
Your guide to NASA’s Artemis 2 Moon mission
Space agency is targeting Wednesday for the historic journey — its first to the moon in more than half a century.
Astronomy
April 1, 2026
April 1, 1995: Hubble images the Pillars of Creation
Today in astronomy history, the Hubble Space Telescope captures one of its most famous photos.
Astronomy
April 1, 2026
Human Spaceflight
Ever since the first human spaceflight on April 12, 1961, humanity has continued to push outward to better understand our solar system and o...- 1
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