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Astronomy
Sedna could be the very first known object from the Inner Oort Cloud. But time is running out to create and launch a mission. In 2003, scientists discovered an object beyond […]
Every professional organization of scientists has a code of ethics and/or conduct. Why not apply it to their journals? When it comes to exploring the Universe, many young people get […]
Even before we have the James Webb Space Telescope, a controversy over when the first stars formed is growing. As far back as our most powerful telescopes have ever looked, we’ve […]
The ingredients for life are everywhere, but so far the only life we know of comes from Earth. Here’s how that might change. Ever since human beings first turned our eyes […]
One of the night sky’s most famous sights isn’t what it appears to be. Perhaps the most famous sight of a dying star is the Ring Nebula, known since 1779. The […]
Dark energy tells us that the Universe’s expansion is accelerating. Here’s what that means for our disappearing Universe. One of the biggest surprises for humanity about the Universe is that […]
In the search for the youngest planet in the Universe, astronomers may have accidentally stumbled upon something entirely new. Growing up is hard to do in the Universe. In the great […]
Here on Earth, all the right conditions occurred for intelligent life to come about, but the nearest aliens, if they’re on another world, are light years away. But it doesn’t […]
In 2015, the ultra-distant galaxy CR7 was measured to have hydrogen and helium, but no carbon or oxygen. With new ALMA observations, there’s carbon after all. As brilliant as our Universe’s […]
‘Luck’ is the wrong word. The Universe cooperated, but we gave ourselves the opportunity by being prepared. It was already 28 years ago that the Hubble Space Telescope was launched […]
The solar neighborhood is so different than people imagine. But for the first time, we know what it’s like. When you look up at the stars in the night sky, they […]
The picture itself is breathtaking. But what we learn is truly eye-opening. Galaxy clusters, like the massive one captured here by Hubble, PLCK G004.5–19.5, impress not just for their looks, […]
Among the general public, people compare it to the aether, phlogiston, or epicycles. Yet almost all astronomers are certain: dark matter and dark energy exist. Here’s why. If you go by […]
It took the Universe 9.2 billion years to create the Earth, and another 4 billion for complex life. Could we have gotten there faster? The story of how the Universe came […]
BICEP2 scientist Brian Keating’s new book is honest and insightful, but just as notable for what it fails to recognize. Imagine what it’s like to be a scientist working on […]
In the aftermath of everything we’ve learned about what’s in the Universe, we can make much better estimates of how many alien civilizations are out there. In 1961, scientist Frank Drake […]
Even with nothing new falling into it, our radius is increasing with every second that goes by. It’s no big secret that galaxies grow over time. The force of gravity is […]
Congress refused the majority of Trump’s proposed cuts to NASA’s budget. But many uncertainties remain. On March 21st, 2018, both branches of Congress passed the United States’ Consolidated Appropriations Act, […]
It’s the first, most naive question you might think to ask. The solution is a lot more complicated than you imagine. According to a large amount of evidence, the overwhelming majority […]
With hundreds of billions of stars burning bright, ‘dead’ seems like a bit of an exaggeration. But every galaxy is headed for this fate, including ours. As long as a […]
For every planet that orbits a star like our own, there are likely thousands of ‘orphan planets’ wandering the galaxy alone. Here in the Solar System, we can watch our star’s […]
There have been a lot of public advocates from the “no dark matter” camp, getting lots of popular attention. But the Universe still needs dark matter. Here’s why. If you took […]
The possibilities were almost limitless, so why does everything line up? Our Solar System is an orderly place, with the four inner planets, the asteroid belt, and the gas giant worlds […]
If the multiverse is real, why hasn’t our Universe, in a sea of infinite possibilities, run into another one at least once? The Universe we inhabit is vast, full of matter […]
Distances in the expanding Universe don’t work like you’d expect. Unless, that is, you learn to think like a cosmologist. There are a few fundamental facts about the Universe — its origin, […]
LISA, the Laser Interferometer Space Antenna, will not only be the space-based successor to LIGO, but will predict black hole mergers up to years in advance. Across the Universe, innumerable masses […]
A single, complete view of half the world was enough to teach us how these distant, frozen bodies work. On July 14, 2015, NASA’s New Horizons flew by Pluto. Pluto’s atmosphere, […]
Okay, this is an incredible and rare opportunity, but I’m so pleased to announce that next January, from the 18th-24th, 2019, I’ll be leading an exclusive AstroTour of Iceland! We’ll […]
There are many arguments over what makes a theory beautiful, elegant, or compelling. But in the face of data, predictive power is everything. When you look at any phenomenon in […]
The Universe may defy our intuition, but that’s what science is for! If you take a look out at the Universe, and in every direction you look, you see objects rushing […]