From black holes to dark energy to chances for life in the Universe, our cosmic journey to understand it all is just getting started.
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Sometimes, going “deeper” doesn’t reveal the answers you seek. By viewing more Universe with better precision, ESA’s Euclid mission shines.
Over time, the Universe becomes less dominated by dark matter and more dominated by dark energy. Is one transforming into the other?
From how life emerged on Earth to why we dream, these unanswered questions continue to perplex scientists.
While humanity has been skywatching since ancient times, much of our cosmic understanding has come about only recently. Very recently.
Freethink’s weekly countdown of the biggest space news, featuring Starship’s second test flight, a new “dark mysteries” telescope, and more.
The farther away they get, the smaller distant galaxies look. But only up to a point, and beyond that, they appear larger again. Here’s how.
There are two types of missing, or “dark” matter: baryonic (made of normal matter) and non-baryonic. Have we finally found the normal stuff?
13.8 billion years ago, the hot Big Bang gave rise to the Universe we know. Here’s why the reverse, a Big Crunch, isn’t how it will end.
If you’ve found yourself befuddled by extraordinary scientific-sounding claims, you’re not alone. But this centuries-old lesson can help.
We confidently state that the Universe is known to be 13.8 billion years old, with an uncertainty of just 1%. Here’s how we know.
The theory is accurate within at least one part in a quadrillion.
From quarks and gluons to giant galaxy clusters, everything that exists in our Universe is determined by what is (and isn’t) bound together.
When it comes to predicting the energy of empty space, the two leading theories disagree by a factor of 100 googol quintillion.
There are a few clues that the Universe isn’t completely adding up. Even so, the standard model of cosmology holds up stronger than ever.
When white dwarfs explode, they create a type Ia supernovae. After decades of following the leading theory, here’s the complete overhaul!
The Universe isn’t just expanding, the expansion is also accelerating. If that’s true, how will the Milky Way and Andromeda eventually merge?
Bang bang all over the Universe.
There are two fundamentally different ways of measuring the Universe’s expansion. They disagree. “Early dark energy” might save us.
On the largest cosmic scales, galaxies line up along filaments, with great clusters forming at their intersection. Here’s how it took shape.
It may be time for a cosmological paradigm shift.
Modern cosmology conjectures different possible fates for the Universe and thus for the end of time. Details depend on which model is right.
From before the Big Bang to the present day, the Universe goes through many eras. Dark energy heralds the final one.
Many people out there, including scientists, claim to have discovered a series of game-changing revolutions. Here’s why we don’t buy it.
Is the Universe finite or infinite? Does it go on forever or loop back on itself? Here’s what would happen if you traveled forever.
In all the Universe, only a few particles are eternally stable. The photon, the quantum of light, has an infinite lifetime. Or does it?
It’s not about particle-antiparticle pairs falling into or escaping from a black hole. A deeper explanation alters our view of reality.
The Universe isn’t as “clumpy” as we think it should be.
An incredible composite image of Pandora’s Cluster, Abell 2744, simultaneously showcases both our impressive knowledge and vast ignorance.
From the tiniest subatomic scales to the grandest cosmic ones, solving any of these puzzles could unlock our understanding of the Universe.