Our Sun will continue to grow, becoming a red giant and then a planetary nebula. Here’s how large it will get.
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It’s like a little magnetic “nom, nom.”
Because of dark energy, distant objects speed away from us faster and faster as time goes on. How long before every galaxy is out of reach?
Whether they’re gas giants or rocky planets makes all the difference for life. Over the past 30 years, we went from not knowing if there were planets like ours around other […]
Leading a scientific revolution is easy: you just have to succeed where the current theory fails while equaling its successes. Good luck!
Newton thought that gravitation would happen instantly, propagating at infinite speeds. Einstein showed otherwise; gravity isn’t instant.
If there’s no phosphine, there’s no indirect evidence for biological activity there. In one of the biggest surprises in the history of planetary science, a September 2020 study announced the presence […]
Known as hypervelocity stars, we originally thought just one would be ejected every 100,000 years. The real number is much greater.
Although human beings arrived on Earth just ~300,000 years ago, we’ve transformed the entire planet completely. Here’s how we did it.
Many planets will eventually be devoured by their parent star. For the first time, we caught a star in the act, eating its innermost planet!
In terms of the planets we’ve discovered, super-Earths are by far the most common. What does that mean for the Universe?
An annular eclipse is coming to Earth on October 14, 2023. Six months later, a total solar eclipse is headed our way. Here’s the reason why.
The past ~4 billion years have been an incredibly successful, unbroken run for life on Earth. The future won’t be nearly so bright.
I’m not saying it’s not aliens, but it’s not aliens. When it comes to life in the Universe, we still have no definitive answer to the biggest question of all, “are […]
What do we mean by a black hole’s size? A photon sphere? The minimal stable orbit? The event horizon? The singularity? Which one is right?
Scientists have detected within the Venusian atmosphere a chemical known to be a byproduct of life.
Each of our three nearest stars might have an Earth-like planet in orbit around it. Here’s what we’ll learn when we finally observe it.
The odds are slim, but the consequences would be literally world-ending. There really is a chance of a black hole devouring the Earth.
A new model of the Antikythera mechanism reveals a “creation of genius.”
Compared to Earth, Mars is small, cold, dry, and lifeless. But 3.4 billion years ago, a killer asteroid caused a Martian megatsunami.
Betelgeuse, the tenth brightest star in the night sky, mysteriously dimmed last year. Now researchers know why.
Lots of people have seen lots of bizarre events and phenomena that defy our conventional experience. But is there a scientific explanation?
Red dwarf stars were supposed to be inhospitable. But TOI-700, now with at least two potentially habitable worlds, is quite the exception.
Pseudoscience is science’s shadow.
Einstein’s “happiest thought” led to General Relativity’s formulation. Would a different profound insight have led us forever astray?
The mediocrity principle is often used to make claims about the abundance of life across the universe, but these claims are likely unfounded.
Here’s how the closest place to “hell” in our Solar System might actually be home to life. From afar, Venus seems like the most uninhabitable planet of all. NASA’s Magellan mission […]
Shortly after planet Earth formed, life took a permanent hold on our surface. But just how common is such an outcome?
The Universe begins with negligible amounts of angular momentum, which is always conserved. So why do planets, stars, and galaxies all spin?
It’s the best-known transcendental number of all-time, and March 14 (3/14 in many countries) is the perfect time to celebrate Pi (π) Day!