Space Exploration

Space Exploration

Interior view of a large observatory telescope in operation at night, with orange light trails and a starry sky visible through the open roof.
The Vera C. Rubin Observatory in Chile will image the southern sky using the largest digital camera ever built.
Edwin Hubble and Andromeda galaxy
For decades, astronomers have claimed the Milky Way will merge with Andromeda in ~4 billion years. Here's why, in 2025, that seems unlikely.
launch James Webb
As US science faces record cuts to funding, jobs, and facilities, these 10 quotes help remind us how science brings value to us all.
It rotates on its axis, revolves around the Sun, moves throughout the Milky Way, and gets carried by our galaxy all throughout space.
An artist's impression of a cluster of stars.
Many were hoping that JWST would find the first stars of all. Despite many hopeful claims, it hasn't, and probably can't. Here's how we can.
An astronaut in a spacesuit stands facing a large red planet or celestial body with a glowing edge against a black background.
18mins
“We are beginning to take our first steps out into the cosmic ocean… and the water seems inviting.”
A colored pixelated grid with rectangular outlines; a legend in the top right labels blue as F115W, green as F200W, and red as F277W—capturing data from the JWST to record a distant galaxy.
Coming from just 280 million years after the Big Bang, or 98% of cosmic history ago, this new, massive galaxy is a puzzle, but not a mirage.
Two bright, irregularly shaped nebula clouds with blue, purple, and pink gases dominate the dark space background, where dazzling stars twinkle—reminding us that in space, appearances can deceive.
There's an old saying that "what you see is what you get." When it comes to the Universe, however, there's often more to the full story.
A person sits on a chair with hands clasped, facing forward. Blue waveforms and dots form a digital backdrop behind them.
1hr 19mins
“We don't have enough knowledge to precisely calculate what is going to happen, and so we assign probabilities to it, which reflects our ignorance of the situation.”
Astro2020
NASA astrophysics, which gave us Hubble, JWST, and so much more, faces its greatest budget cut in history. All future missions are at risk.
Diagram of the solar system with gravitational waves emanating from a distant bright source, and a triangular spacecraft array detecting the waves in space.
Just 10 years ago, humanity had never directly detected a single gravitational wave. We're closing in on 300 now, with so much more to come!
A dense field of stars and galaxies is visible against a black background, with some bright stars showing lens flares.
The COSMOS-Web survey is now complete, combining JWST and Hubble infrared data. Its spectacular views show us the Universe as never before.
A green planet with rings is shown against a starry black background, with shadowy humanoid figures visible inside the planet’s outline.
Long before the search for biosignatures, scientists imagined a cosmos teeming with intelligent life.
A vintage-style illustration of a celestial scene, echoing science fiction by scientists, features a textured black planet and a whimsical moon with an eye, all enclosed in a pale green border against a starry background.
What happens when scientists "write what they know"? Some amazing science fiction stories.
A man in a blazer holds up a yellow card with black line drawings and gestures with his other hand against a plain background.
8mins
"There is interesting ethical questions about how we should actually conduct ourselves in [a space colonization] exploration phase."
Black-and-white photo showing a disc-shaped object with a shadowed underside, floating in a blank sky—an iconic image from the UFO craze.
In this preview from "The Saucerian," author Gabriel Mckee explains how the combination of fantastical stories and obscure bureaucracy launched the “space age of the imagination.”
Illustration of three planets orbiting a star, with colored bands indicating the habitable zone; text reads "FINDING LIFE Habital Zone.
18mins
"There's a long history of people claiming planets which look Earth-like, Earth 2.0, Earth twins."
In all the known Universe, Earth is the only planet known to have native life. What should guide us in expanding humanity beyond our world?
An astronaut stands proudly on the moon's surface near scientific equipment and a lunar lander, as the American flag waves in the background, symbolizing a pioneering USA nation.
After drastic cuts to the NIH, the FDA, the NSF, and the DOE, NASA science faces down its smallest budget ever. All of society will suffer.
A glowing orange planet casts a shadow in space amid a backdrop of stars.
Exoplanets can exist anywhere around their parent stars, even so close that they evaporate or disintegrate. Even the rocky ones.
We understand many things about our Universe, and our home within it, extremely well. The number of stars in the Milky Way isn't among them.
A person in a suit sits on a chair against a cosmic background with galaxies and stars.
1hr 33mins
"Many astronomers are really driven by the search for Earth twins because I think deep down the natural endpoint of this whole goal of looking for planets is to answer the question, are we alone?"
globular cluster terzan 5
For centuries, even after we knew the Sun was a star like any other, we still didn't know what it was made of. Cecilia Payne changed that.
From the vastness of space, Earth at night reveals its exo-earth beauty, with illuminated continents showcasing a tapestry of lights across North and South America. Major cities and regions emerge from the glowing darkness, painting a vivid picture against the backdrop of oceans.
Even from a single pixel, multiwavelength data taken over time can reveal clouds, icecaps, oceans, continents, and even signs of life.
Two side-by-side images of the Pillars of Creation in the Eagle Nebula showcase different views with vibrant colors and star-filled backgrounds, embodying the great paradox of beauty within science.
Our scientific instruments are constantly improving, revealing nature's workings as never before. Without them, we'll remain in the dark.
A tilted spiral galaxy gracefully tipped towards the viewer reveals a bright core and dark, dusty rings, set against the infinity of deep blue space.
When we see spiral galaxies, some are face-on, others are edge-on, but most are tipped at an angle. But which side is closest to us?
Composite image of spiral galaxy NGC 300. Left: wide view with area highlighted. Right: close-up of highlighted area. Bottom: magnified star field view. NASA and the Hubble Heritage Team.
The tiniest galaxies of all are the most susceptible to violence by their larger, bullying siblings. That's why we need them in isolation.
A red star is at the center, with five orbiting paths marked by yellow dots, resembling exoplanets around the nearest single star, set against a starry night backdrop that illustrates a planetary system.
Barnard's star, the closest singlet star system to ours, has long been a target for planet-hunters. We've finally confirmed it: they exist!
A group of five men in suits pose with model rockets, showcasing their commitment to fundamental research. Beside them, an illustration depicts a space station orbiting Earth and the Moon, highlighting their visionary investment in space exploration.
Back in 1970, Sister Mary Jucunda wrote NASA, decrying large investments in science. A former Nazi's legendary response is still relevant.
The words "Cosmic Origins" appear in bold against a colorful, radiant explosion resembling a galaxy or cosmic event.
21mins
"Asking the question of, where did the entire universe come from, is no longer a question for poets and theologians and philosophers. This is a question for scientists, and we have some amazing scientific answers to this question that have defied even the wildest of our expectations."