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What would happen if you fell into a black hole? How big is the universe? Just what the heck is a quasar, anyway? You've got questions, and astrophysicist Paul Sutter has the answers! Submit...
How can matter ever go faster than light? What happens when it does? Who discovered this, and what is it good for? I discuss these questions...
What did the universe do to make so many defects? What happens when they get trapped? And could they be hiding right in front of our noses?...
What makes the interstellar comet 3I/Atlas so weird? Why are we finding so many interstellar visitors recently? How are they made, and where...
What do we find when we push the James Webb Space Telescope to its limits? Are Little Red Dots newborn galaxies or old black holes? What are...
How can anyone agree on the age of the universe? And how can we be so confident if it's all just a bunch of models? What if the universe is...
Why is math so effective at describing the universe? What is reality is made of math? What does it mean for us to be conscious beings in a m...
What is the weak equivalency principle? How was antimatter discovered and why is it the perfect thing to put gravity to the test? What did t...
How does the double-slit experiment work? What does it teach us about reality and measurement if we try to mess with the experiment after it...
What is causal determinism? What are some of the ways that physics can permit free will? What does emergence have to do with all of this? I...
What do extra dimensions have to do with the strength of gravity? What is a tower of gravitons? How can we detect extra dimensions even if w...
What happens to a white dwarf when it cools off? How long does it take? Do they just stay black forever, or will something more interesting...
How did we discover the weak nuclear force? Why is it so strange compared to the other forces? What do mirrors have to do with all of this?...
Is the universe infinite? What about the cosmological horizons, the limits to what we can see? Will we ever know for sure what's beyond them...
Why did we develop the International Space Station in the first place? What have we learned in its 25+ years of operation? When is it coming...
How do particle colliders work? What kinds of energies are we talking about? Are there any uses for colliders except for physics experiments...
What are some sources of gravitational waves that aren't black holes? How did inflation create gravitational waves? How can we possibly dete...
How do we measure the sizes of stars? What are the biggest ones today, and how big could stars have gotten in the past? Is there any way for...
What powers Cepheid variable stars? What about Mira variables and pulsating stars? And are there variable stars that don't actually vary at...
What would the Sun sound like if we could hear it? Does any noise at all happen in the universe? What's the biggest sound of all? I discuss...
Why does the vacuum of spacetime have energy? How much energy does it have? What prevents us from using it to do anything useful? I discuss...
How do we actually define voids? Are there regions within them that are truly empty? What would it be like to be inside one? I discuss these...
Part 2 of 2! What are the modern constants of nature? Is the universe fine-tuned for life? Does the multiverse or string theory explain the...
Part 1 of 2! How do fundamental constants appear in physics? Why are they so important? Why do we care where they come from? I discuss these...
What's inside a neutron star? What strange states of matter do we encounter? And what mysteries will we find deep in the core? I discuss the...
How do we explain the giant black holes appearing in the young universe? Is it possible to directly collapse a black hole, skipping the form...
How do you measure the impact of a scientist? Does Stephen Hawking compare to Newton or Einstein? What were his contributions to black holes...
Why is the moon so special? Why do we think a giant impact created it? Why didn't the same thing happen to other planets? I discuss these qu...
What is 21-cm radiation? What (and who) produces it? What causes it, and what does it tell us about the universe? I discuss these questions...
What is an Alcubierre warp drive? What would it take to make it work? Could it propel spacecraft even below the speed of light? I discuss th...
What is an axion? How could axions make a star, and what does that have to do with dark matter? What would these stars look like? I discuss...
Where do parallel universes exist? Could we use wormholes to travel to them? What does time travel have to do with all this? I discuss these...
What is the Fermi Paradox? How rare is non-intelligent vs intelligent life? What are the challenges a species must overcome to colonize the...
Are dark photons as sinister as they sound? What did the curvaton do in the early universe? And is everything really made of preons? I discu...
How can the solar corona be hotter than the surface? What has the Parker Solar probe learned so far? What do magnetic fields have to do with...
Are we "in range" of any potential supernovae? Has the Earth ever been hit in the past? And what about gamma-ray bursts from across the gala...
How do black holes get close enough to merge? What causes them to emit gravitational waves, and where do the waves come from? What does the...
How did Pluto get demoted? What makes a planet a planet anyway? Why do we now have so many different kinds of planets, and should we make th...
How do gravitational lenses work? Where would a spacecraft need to be to use the Sun's gravity as a telescope? What could we learn about exo...
What's behind the Martian Methane Mystery? Is it a sign of life, or just some strange chemical process? Or are we just fooling ourselves? I...
Why are private space companies pushing tourism? Is there a future for tourism in space? Is this an overall good thing for space exploration...
Where do we live within the galaxy? What shapes the local bubble? How long will we be inside it? I discuss these questions and more in today...
How do galaxies form and evolve? Is the universe still making new ones? What will happen to the current galaxies in the universe? I discuss...
What has the James Webb Space Telescope learned so far? Is it finding galaxies that "break" cosmology? What will we learn next? I discuss th...
Can galaxies ever get destroyed? What happens to their stars? Do galaxies ever die? I discuss these questions and more in today's Ask a Spac...
What does it mean for the universe to have a center? Could we ever travel to ours? What is a singularity? I discuss these questions and more...
How does length contraction work in relativity? Do moving objects really get shorter? What about from their perspective? How are we supposed...
What is the "cold spot" on the cosmic microwave background? Why shouldn't it exist? What are some possible explanations for it, and why are...
How do planets get tidally locked? What are these systems typically like? Can life find a home in such a challenging environment? I discuss...
If we went to the Moon already, why can't we go back so easily? What technology have we lost? What are we trying to do differently? I discus...
What's the most distant thing we can see with the naked eye? What about with a telescope? What about at other wavelengths? Is there anything...