11 Things We’d Really Like to Know: Honestly, Some Questions Are Better Left Unanswered

Cat-poop coffee. Time travel. Alien messages. We should leave some mysteries alone.

Trolling the Monster in the Heart of the Milky Way

Something very large and dark occupies the center of our galaxy, and new data suggest that…

Kepler, the Little NASA Spacecraft That Could, No Longer Can

After nine and a half years in orbit, 530,506 stars observed and 2,662 planets around other…

Hawaiian Supreme Court Approves Giant Telescope on Mauna Kea

The court granted a building permit for a roughly $2 billion observatory, which activists had protested…

Out There: Stephen Hawking’s Final Paper: How to Escape From a Black Hole

In a study from beyond the grave, the theoretical physicist sings (mathematically) of memory, loss and…

Hubble Telescope, Disoriented by Mechanical Failure, Takes a Nap to Reboot

NASA’s observational workhorse enters “safe mode” after a gyroscope malfunctions.

Trilobites: NASA’s TESS Starts Collecting Planets

The satellite, launched in April, has already identified at least 73 stars that may harbor exoplanets,…

Out There: Mars Is Frigid, Rusty and Haunted. We Can’t Stop Looking at It.

An oasis in the sky inspires the imagination. A series of discoveries refreshes our yearning for…

It Came From a Black Hole, and Landed in Antarctica

For the first time, astronomers followed cosmic neutrinos into the fire-spitting heart of a supermassive blazar.

Bradford Smith, Who Showed Postcards From Outer Space, Dies at 86

As head of the camera team for the Voyager mission, Dr. Smith was humanity’s tour guide…