Browsing: Lens_matter

Given how hazardous greenhouse gases (GHGs) are to our atmosphere and climate, it is perplexing to find hardly anyone talking about how those gases are measured. Even among those who do, you seldom spot anyone who mentions—amid the small fonts and tables, graphs, and charts—how data is collected in the field. Why? Because the tools […]

How stars and UFOs set one astrophysicist on her path.

Space mining is no longer science fiction. By the 2020s, Planetary Resources and Deep Space Industries—for-profit space-mining companies cooperating with NASA—will be sending out swarms of tiny satellites to assess the composition of hurtling hunks of cosmic debris, identify the most lucrative ones, and harvest them. They’ve already developed prototype spacecraft to do the job. […]

When you observe a solar eclipse—with great care, of course—what you see is a thin, red crescent outlining the blocked-out Sun and, extending beyond it, a stark white mane. This is the corona, an aura millions of miles thick of superheated plasma. It’s natural to assume the corona is cooler than the sun’s blazing surface. […]

An astrophysicist sits down with Nautilus to discuss cosmology and culture.

A new theory sheds light on the emergence of life’s complexity.

Given how absurdly vast the cosmos is, with its hundreds of billions of galaxies, picturing it isn’t easy. You might think it natural, for instance, to see all these galaxies as more or less evenly spread out across the Universe. But you’d be wrong. Following the Big Bang, 13.8 billion years ago, says Robert Kirshner, […]

On February 3, Cliff Burgess, a physicist at McMaster University, emailed some of his colleagues about an exciting rumor—a possible discovery—that, if verified at a press conference later today, would mean a “Nobel prize is coming someone’s way.” According to “spies,” Burgess said, an instrument called LIGO (the Laser Interferometer Gravitational-Wave Observatory) had apparently observed […]

In 1944, John Wheeler received a haunting postcard. It was from his younger brother, Joe, who had written only two words: “Hurry up.” Wheeler was involved with the United States’ atomic weapons effort, and Joe wanted him to finish the bomb so he could come home from fighting in Italy. But by the time Hiroshima […]

A geologist explains that climate change is not just about a global average sea rise.