A Day in Astronomy: The First U.S. Spacewalk

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Image (Credit): NASA astronaut Ed White during the Gemini 4 mission on June 3, 1965. (NASA)

On this day in 1965, U.S astronaut Edward H. White became the first American to conduct a spacewalk during the Gemini 4 mission. His 23 minute mission lasted from his exit from the capsule over the Pacific to his return while over the Gulf of Mexico. He used a maneuvering gun to push himself away from the capsule as well as to push himself back.

At the end of his spacewalk, Ed White stated:

I’m coming back in… and it’s the saddest moment of my life.

Ed White later died in the launchpad explosion of Apollo 1 in 1967, along with astronauts Virgil I. “Gus” Grissom and Roger B. Chaffee.

An Apollo 1 crew memorial is located at Arlington National Cemetery (shown below) with the inscription, “Ad Astra per Aspera,” which in Latin means, “A rough road leads to the stars.”

Image (Credit): The Apollo 1 crew memorial at Arlington National Cemetery in Virginia. (Arlington National Cemetery)

Space Stories: A Massachusetts Meteor, The Red Dwarf Diet, and an Extra Ice Giant in Our Solar System

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Image (Credit): A exploding meteor off the coast of Massachusetts as captured by the National Oceanic and Atmospheric Administration’s Geostationary Lightning Mapper on May 30, 2026. (National Oceanic and Atmospheric Administration)

Here are some recent space-related stories.

—WCVB5 News: “Meteor That Rattled Massachusetts Was Bigger Than First Thought, NASA Says“

A meteor that created a sonic boom heard by thousands in Massachusetts and parts of the Northeast Saturday afternoon was larger than previously believed, NASA said Monday. Scientists now say the meteor was 5 feet in diameter, up from the initial thought of 3 feet, NASA said. “The meteor was about 5 feet (1.6 meters) in diameter with a mass of 5.6 metric tons and entered Earth’s atmosphere at roughly 42,000 mph,” NASA said Monday. Scientists believe it traveled through the atmosphere from northwest to southeast for 26 miles before breaking up at an altitude of 31 miles and producing a meteorite fall into Cape Cod Bay.

—Royal Astronomical Society: “Red Dwarf Stars Detected ‘Eating’ Earth-like Planets“

Astronomers have found some of the strongest evidence yet that stars can swallow their own planets. A new study, published in Monthly Notices of the Astronomical Society, supports the long-held belief that young stars are capable of ‘eating’ nearby worlds as planetary systems form. Researchers from Keele University and the University of Exeter studied thousands of stars and found evidence that six different red dwarfs – the smallest, coolest, and most common type of star in the universe – had engulfed Earth-like rocky planets.

—Phys.org: “One of Our Planets May Be Missing, And it Could Explain Why the Solar System Looks the Way it Does“

Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published in the journal Icarus, this extra world might have triggered a violent planetary shuffling billions of years ago that could have disrupted some of Jupiter’s and Uranus’s moons and possibly led to the formation of others.

Note: Here is the podcast version of this post.

Space Stories: ESA & China Are Smiling, Blue Origin Beats SpaceX to the Moon, and JWST Analyzes Exoplanet Atmosphere

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Here are some recent space-related stories.

—European Space Agency: “Smile Lifts Off on Quest to Reveal Earth’s Invisible Shield Against the Solar Wind“

The Smile spacecraft lifted off on a Vega-C rocket from Europe’s Spaceport in French Guiana at 04:52 BST / 05:52 CEST (00:52 local time) on 19 May 2026. The launch marks the beginning of an ambitious mission to better understand solar storms, geomagnetic storms, and the science of space weather…Smile is a collaboration between the European Space Agency (ESA) and the Chinese Academy of Sciences (CAS). It will reveal how Earth responds to the streams of particles and bursts of radiation from the Sun, using an X-ray camera to make the world’s first X-ray observations of Earth’s magnetic shield, and an ultraviolet camera to watch the resulting northern lights non-stop for 45 hours at a time.

—The Guardian: “Nasa Selects Jeff Bezos’s Blue Origin for First of Three Uncrewed Lunar Missions“

Nasa announced on Tuesday ambitious plans for three uncrewed lunar missions this year to kickstart construction of a $20bn moon base, and said it had chosen the Amazon founder Jeff Bezos’s Blue Origin, ahead of Elon Musk’s SpaceX, to conduct the first...[NASA’s Administrator] said the three missions planned for 2026 would be followed by “more than a dozen” more in the coming years to test systems and equipment. He said the highly successful Artemis II mission last month that sent four astronauts around the moon for the first time since 1972 had been both a catalyst and incentive to advance the moon base plan.

—Astrobiology: “Astronomers Observe Exoplanet Atmospheres With New Cloud-detecting Method“

Every morning, clouds roll in, and by evening, they have cleared off. This sounds like a weather forecast for a coastal city here on Earth — but it’s for WASP-94A b, a well-studied gas giant orbiting a star located nearly 700 light-years away. A new study published in the journal Science documents the first detection of repeating cloud cycles on a hot Jupiter exoplanet. The first author of the study is Sagnick Mukherjee, a 51 Pegasi b postdoctoral fellow at Arizona State University’s School of Earth and Space Exploration. Mukherjee is part of a research team that analyzed data from the James Webb Space Telescope targeting WASP-94 A b, a gas giant in the constellation Microscopium. The team discovered that the planet’s morning side is blanketed in clouds of magnesium silicate, the same mineral found in common rocks, while its evening side is under clear skies.

Note: Here is the podcast version of this post.

Space Quote: NASA Has Lessons for Automating American Industry

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Credit: Image by David Yonatan González Aburto from Pixabay.

“At NASA, decades of designing humanoid robots for environments that don’t forgive narrow thinking revealed that the machines that failed were the ones built for a single scenario. The ones that succeeded could multitask and be reprogrammed– for deployment in different settings. The arm built for the Space Shuttle, for example, was designed to position an astronaut who would catch and later release a satellite. It turned out the robot was better at making the catch itself — but positioning astronauts proved useful for other tasks, like repairing the Hubble Space Telescope.”

-Statement by Dr. Robert Ambrose, Chairman of Robotics and Artificial Intelligence at alliant and former Chief of the Software, Robotics and Simulation Division at NASA. He was discussing robotics in a Fortune magazine story titled “Former NASA Robotics Chief: America is Building the Wrong Kind of Robots — and China Knows It.” It is nice to see that NASA can teach the private sector a few things about preparing for the future. The agency has a wealth of information that can be shared with the private sector and allied countries. We just need to recognize the treasure trove of information we have accumulated at NASA over the years and do our best to preserve it and build upon it.

Twelfth Starship Launch Successful

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Credit: SpaceX

Fortunately, the first SpaceX Starship launch of the year (and the twelfth for the rocket) went well yesterday with only a few bumps along the way. While it was not perfect, given that it was the first test of a new version of the rocket, it was a good night for the rocket-maker and NASA.

Here is SpaceX’s description of some of the bumps last night:

Following stage separation, the Super Heavy booster performed a directional flip maneuver and attempted its boostback burn. It was unable to light all planned engines and performed a partial boostback burn that ended early. Super Heavy attempted to reignite its engines for the landing burn before experiencing a hard splashdown in the Gulf of America. During its ascent burn to space, Starship lost one of the Raptor 3 vacuum engines but demonstrated its engine-out capability and achieved its planned trajectory.

This latest test is encouraging, but would be more encouraging is a solid schedule of more tests this year to ensure the Starship will be ready for the Artemis III low Earth orbit tests next year. SpaceX is still significantly behind schedule on it launches. For instance, this twelfth launch was delayed many times.

Both SpaceX and Blue Origin are racing to be part of the Artemis III test in late 2027 to see if NASA is really ready for a crewed landing on the Moon in 2028. This latest launch brings SpaceX that much closer.