
Stefanie Waldek
Space.com contributing writer Stefanie Waldek is a self-taught space nerd and aviation geek who is passionate about all things spaceflight and astronomy. With a background in travel and design journalism, as well as a Bachelor of Arts degree from New York University, she specializes in the budding space tourism industry and Earth-based astrotourism. In her free time, you can find her watching rocket launches or looking up at the stars, wondering what is out there. Learn more about her work at www.stefaniewaldek.com.
Latest articles by Stefanie Waldek

Juno spacecraft finds auroral 'footprints' of Jupiter's moon Callisto for 1st time
By Stefanie Waldek published
Yes, even Jupiter's moons produce auroras.

Huge chunks of ancient cosmic objects may be stuck inside Mars
By Stefanie Waldek published
Data from NASA's InSight lander suggests there's a chunky mix beneath the surface of Mars.

The interstellar comet 3I/ATLAS is wrapped in carbon dioxide fog, NASA space telescope reveals
By Stefanie Waldek published
The interstellar visitor appears to have a lot in common with its solar system brethren.

How old is Jupiter? Meteorite 'raindrops' help scientists pin down gas giant's age
By Stefanie Waldek published
Scientists have solved how molten "raindrops" in meteorites, called chondrules, were formed — and the discovery reveals key details about Jupiter's origin.

'Devil Comet' contains 'strongest evidence yet' that comets delivered water to Earth
By Stefanie Waldek published
While observing the Halley-type comet 12P/Pons-Brooks with ALMA and NASA's Infrared Telescope Facility, researchers determined that the comet's water is strikingly similar to the water on Earth.

Is water really a necessary ingredient for life? Aliens may swim in truly exotic pools
By Stefanie Waldek published
A new study finds that liquids other than water might be able to support life on worlds beyond Earth, potentially expanding the envelope of life throughout the cosmos.

Mars orbiter looks deep into chasms and valleys on the Martian surface
By Stefanie Waldek published
ESA's Mars Express spacecraft has been imaging the dynamic Acheron Fossae region of Mars for more than 20 years.

Astronomers use starlight to measure greenhouse gases in Earth's atmosphere
By Stefanie Waldek published
Scientists have developed an algorithm called Astroclimes, which transforms stargazing instruments into climate sensors that measure greenhouse gases in Earth's atmosphere.

James Webb Space Telescope spots a potential new exoplanet just 4 light-years away from Earth
By Stefanie Waldek published
Astronomers using NASA's James Webb Space Telescope have found strong evidence for a new exoplanet — one orbiting Alpha Centauri A, the nearest sun-like star to Earth.

New world record! Weather satellites detect 515-mile-long lightning flash
By Stefanie Waldek published
Meet the astonishing phenomenon of megaflash lightning.

Astronauts' arteries are A-OK after living on the International Space Station, per a new study
By Stefanie Waldek published
Living in space changes the human body — but arteries seem particularly resilient to microgravity's effects.

SpaceX’s Starlink satellite constellation is interfering with radio telescope observations
By Stefanie Waldek published
Astronomers have long voiced concerns about Starlink's satellite constellation interfering with observations of the universe, and a new survey by Curtin University confirms those fears.

Every living former NASA science chief opposes Trump's proposed budget cuts in letter to Congress
By Stefanie Waldek published
The letter warns that the proposed FY2026 budget would halt dozens of missions, gut future programs and threaten U.S. leadership in space science.

Scientists to unveil 1st images from the Vera C. Rubin Observatory on June 23: Watch the big moment live
By Stefanie Waldek published
The Vera C. Rubin Observatory's first images will be unveiled on Monday (June 23), and you can watch the action live.

Satellite images show a dramatic decline in Antarctica's emperor penguin population — and it's happening faster than we thought (photos)
By Stefanie Waldek published
One region of the continent saw a 22% decline in emperor penguin numbers over 15 years.

Why does NASA's Perseverance rover keep taking pictures of this maze on Mars?
By Stefanie Waldek published
NASA's Perseverance rover regularly images a Sherlock Holmes–themed maze to calibrate its chemical-hunting SHERLOC instrument.

Turning the Red Planet green? It's time to take terraforming Mars seriously, scientists say
By Stefanie Waldek published
A new study debates the complex ethical questions that must be considered if we're to terraform Mars and lays the blueprint for a potential path forward.

'One of the most geometrically perfect': What is this mysterious sphere deep in the Milky Way galaxy?
By Stefanie Waldek published
A supernova remnant (SNR) discovered by astrophysicist Miroslav Filipović of Western Sydney University displays an astonishingly spherical shape.

Not-so-clean rooms: Scientists discover 26 new microbe species in NASA spacecraft facility
By Stefanie Waldek published
Scientists have discovered 26 previously unknown bacterial species in the clean rooms that were used to prep NASA's Phoenix Mars lander for its 2007 launch.

Satellites show 28 US cities are sinking, including NYC and Chicago: 'Infrastructure can be silently compromised'
By Stefanie Waldek published
"Even slight downward shifts in land can significantly compromise the structural integrity of buildings, roads, bridges, and railways over time."

NASA diagnoses fracture in a 'huge cosmic bone' using X-ray observatory
By Stefanie Waldek published
A combination of X-ray from NASA's Chandra observatory and radio data indicates that a galactic "fracture" was likely caused by a special neutron star called a pulsar.

Northern lights (aurora borealis): What they are and how to see them
By Daisy Dobrijevic last updated
Reference The northern lights are one of the most mesmerizing natural wonders you can witness firsthand.

New JWST observations of 'trans-Neptunian objects' could help reveal our solar system's past
By Stefanie Waldek published
The James Webb Space Telescope has observed surface ice methanol — a key building block for organic compounds necessary for life, including sugars — on trans-Neptunian objects.

Climate change is officially the leading threat to imperiled species in the United States
By Stefanie Waldek published
For the first time, scientists have identified climate change as the top driver of human-caused biodiversity loss among species protected under the Endangered Species Act.
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