Brief history of how we brought the stars indoors to planetariums
Picture this: a small audience is quietly ushered into a darkened room. They gasp in awe, as a brilliant night sky shines above. They wonder – as many after them will do – what trickery has made the roof above their heads disappear? But this is a performance; the stars above an ingenious projection. For …
Rubin Observatory assembling the most complete time-lapse record of the universe
On 23 June 2025, the world will get a look at the first images from one of the most powerful telescopes ever built: the Vera C. Rubin Observatory. Perched high in the Chilean Andes, the observatory will take hundreds of images of the southern hemisphere sky, every night for 10 years. In doing so, it …
New model helps to figure out which distant planets may host life
The search for life beyond Earth is a key driver of modern astronomy and planetary science. The U.S. is building multiple major telescopes and planetary probes to advance this search. However, the signs of life – called biosignatures – that scientists may find will likely be difficult to interpret. Figuring out where exactly to look …
Landing on the Moon is still an incredibly difficult feat in 2025
Half a century after the Apollo astronauts left the last bootprints in lunar dust, the Moon has once again become a destination of fierce ambition and delicate engineering. This time, it’s not just superpowers racing to plant flags, but also private companies, multinational partnerships and robotic scouts aiming to unlock the Moon’s secrets and …
Astronaut Sally Ride’s legacy – encouraging young women to embrace science and engineering
On June 24, 1983, Sally Ride returned to earth after becoming the first American woman to fly into space, riding Space Shuttle Challenger on mission STS-7 along with four other crew members. Only five years earlier, in 1978, she had been selected to the first class of 35 astronauts – including six women – who …
Voyager Missions Word Search
Launched in 1977, NASA’s Voyager 1 and 2 spacecraft have been expanding our knowledge of the solar system ever since. The twin probes are now traversing interstellar space. We’ve hidden 27 words related to the missions. They may be placed horizontal, vertical, or even diagonal. Good luck! Author Chase Clark Chase is the founder of …
Radioisotope generators are the ‘nuclear batteries’ that power faraway spacecraft
Powering spacecraft with solar energy may not seem like a challenge, given how intense the Sun’s light can feel on Earth. Spacecraft near the Earth use large solar panels to harness the Sun for the electricity needed to run their communications systems and science instruments. However, the farther into space you go, the weaker the …
Voyager 1 thrusters, inoperable for 21 years, fixed from 15 billion miles away
Engineers at NASA’s Jet Propulsion Laboratory in Southern California have revived a set of thrusters aboard the Voyager 1 spacecraft that had been considered inoperable since 2004. Fixing the thrusters required creativity and risk, but the team wants to have them available as a backup to a set of active thrusters whose fuel tubes are …
Scientists discover ancient buried beach on Mars
In the 1970s, images from the NASA Mariner 9 orbiter revealed water-sculpted surfaces on Mars. This settled the once-controversial question of whether water ever rippled over the red planet. Since then, more and more evidence has emerged that water once played a large role on our planetary neighbour. For example, Martian meteorites record evidence for …
Mars may have once had a carbon cycle more favorable for life
Mars, one of our closest planetary neighbors, has fascinated people for hundreds of years, partly because it is so similar to Earth. It is about the same size, contains similar rocks and minerals, and is not too much farther out from the Sun. Because Mars and Earth share so many features, scientists have long wondered …
Pearl Young overcame barriers and ‘raised hell’ at NASA
Thirteen years before any other woman joined the National Advisory Committee for Aeronautics – or the NACA, NASA’s predecessor – in a technical role, a young lab assistant named Pearl Young was making waves in the agency. Her legacy as an outspoken and persistent advocate for herself and her team would pave the way for …
New theory explains how water first arrived on Earth
When Earth first formed, it was too hot to retain ice. This means all the water on our planet must have originated from extraterrestrial sources. Studies of ancient terrestrial rocks suggest liquid water existed on Earth as early as 100 million years after the Sun’s formation–practically “immediately” on an astrophysical timescale. This water, now over …
Why meteorites have less water than the asteroid bits returned by space probes
Much of what scientists know about the early solar system comes from meteorites – ancient rocks that travel through space and survive a fiery plunge through Earth’s atmosphere. Among meteorites, one type – called carbonaceous chondrites – stands out as the most primitive and provides a unique glimpse into the solar system’s infancy. The carbonaceous …
Extraordinary evidence needed to claim discovery of extraterrestrial life
The detection of life beyond Earth would be one of the most profound discoveries in the history of science. The Milky Way galaxy alone hosts hundreds of millions of potentially habitable planets. Astronomers are using powerful space telescopes to look for molecular indicators of biology in the atmospheres of the most Earth-like of these planets. …
Potential sign of life found on a distant planet and why many are still skeptical
A team of astronomers announced on April 16, 2025, that in the process of studying a planet around another star, they had found evidence for an unexpected atmospheric gas. On Earth, that gas – called dimethyl sulfide – is mostly produced by living organisms. In April 2024, the James Webb Space Telescope stared at the …
Gaia telescope ends mission to create 3D map of Milky Way
On Thursday 27 March, the European Space Agency (ESA) sent its last messages to the Gaia Spacecraft. They told Gaia to shut down its communication systems and central computer and said goodbye to this amazing space telescope. Gaia has been the most successful ESA space mission ever, so why did they turn Gaia off? What …
Building blocks of life found within asteroid Bennu
A bright fireball streaked across the sky above mountains, glaciers and spruce forest near the town of Revelstoke in British Columbia, Canada, on the evening of March 31, 1965. Fragments of this meteorite, discovered by beaver trappers, fell over a lake. A layer of ice saved them from the depths and allowed scientists a peek …
100 years ago Edwin Hubble settled astronomy’s ‘Great Debate’
A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his colleagues on his behalf reported that the Andromeda nebula, also called M31, was nearly a million light years away – too remote …
Blue Origin’s New Glenn rockets to orbit − a feat 15 years in the making
Just past 2 a.m. Eastern time on Jan. 16, 2025, a new rocket blasted off from the Cape Canaveral Space Force Station in Florida. By reaching orbit, Blue Origin’s New Glenn rocket launch has marked a milestone for a commercial space company that has big ambitions. As a space policy expert, I see New Glenn’s …
Three years of discovery by the James Webb Space Telescope
O n this day three years ago, we witnessed the nail-biting launch of the James Webb Space Telescope (JWST), the largest and most powerful telescope humans have ever sent into space. It took 30 years to build, but in three short years of operation, JWST has already revolutionised our view of the cosmos. It’s explored …