Are We All Wrong About Black Holes?

Are We All Wrong About Black Holes?

In the early 1970s, people studying general relativity, our modern theory of gravity , noticed rough similarities between the properties of black holes and the laws of thermodynamics.

Great Stunt, Spider-Man! Now Let's Fine-Tune the Physics

Great Stunt, Spider-Man! Now Let's Fine-Tune the Physics

Now, if we put this vertical acceleration together with the fixed horizontal velocity , we get something special, called projectile motion. On the next jump, I get a vertical acceleration of –6.074, which is closer, but you can see that the fit is pretty janky.

As Social VR Grows, Users Are the Ones Building Its Worlds

As Social VR Grows, Users Are the Ones Building Its Worlds

When Rec Room launched in the summer of 2016, it didn't feel like a platform for social virtual reality as much as it did a collection of mini-games.

SpaceX Is Launching 'Organs on a Chip' to the ISS

SpaceX Is Launching 'Organs on a Chip' to the ISS

The following year, the NIH granted a total of $6 million to five research projects that would study how microgravity affects the human body by sending organ and tissue chips to the ISS.

Two Unusual Galaxies Shake Up the Dark Matter Debate, Again

Two Unusual Galaxies Shake Up the Dark Matter Debate, Again

In March, a team of astronomers led by Yale professor Pieter van Dokkum and his graduate student Shany Danieli published two papers, one confirming the existence of a galaxy that appears to have almost no dark matter and the other announcing the discovery of a second galaxy of this type.

Space and Time Could Be a Quantum Error-Correcting Code

Space and Time Could Be a Quantum Error-Correcting Code

Ahmed Almheiri , Xi Dong and Daniel Harlow did calculations suggesting that this holographic “emergence” of space-time works just like a quantum error-correcting code.

How Does a 'Martian'-Style Gravity Assist Actually Work?

How Does a 'Martian'-Style Gravity Assist Actually Work?

The first question is easy—a gravity assist (also called a gravity slingshot) is a space maneuver in which a spacecraft gets a speed boost by moving past a planet.

The Expanse Gets Artificial Gravity Right in This Neat Trick

The Expanse Gets Artificial Gravity Right in This Neat Trick

With no thrust, Jim and Naomi lose their artificial gravity and start floating off the gangway. When the artificial gravity ended, they were still pushing for a short time and this increased their momentum upward.Once they are moving away from the gangway, Jim does something rude.

Astronomers Creep Up to the Edge of the Milky Way’s Black Hole

Astronomers Creep Up to the Edge of the Milky Way’s Black Hole

The idea, first proposed in 2005 by Avery Broderick, now at the Perimeter Institute of Theoretical Physics and the University of Waterloo in Canada, and Avi Loeb of Harvard University, would explain why the black hole appears to flare.“It seems like they’ve got something really exciting here,” added astronomer Andrea Ghez, a longtime competitor to the European team at the University of California, Los Angeles.If these rotating flares are due to hot spots in the way that Broderick and Loeb imagined, additional flares will help reveal the black hole’s “spin,” a measure of its rotation.