Tag Archives: space

The trajectories of life-bearing meteorites from Earth.

Some Japanese researchers did the math on the fate of the billions of tons of rocks and water that were tossed into space when Earth was hit by an asteroid 65M years ago. It turns out that much of that material probably bore life, and it wound up not just on the Moon, but also on on Mars and the moons of Jupiter and Saturn. Some of the ejecta (about 1,000 rocks) would have even wound up on an Earth-like planet orbiting a red dwarf star, located 20 light years away. This math tells us that life would only have needed to evolve at 25 sites throughout the Milky Way for these sorts of spores from those planets to have seeded the entire galaxy with life. 

Links for September 29th

Links for September 8th

  • Open: Emphasis Update and Source
    The New York Times has a great feature that I'd never noticed—the ability to link to pages with specific content highlighted. It's perfect for calling attention to specific paragraphs or sentences when sharing a link with somebody. It's cleverly implemented, too.
  • Time: Why Some Languages Sound So Fast
    All languages, when spoken, have basically the same information density. If more meaning is packed into shorter words, its speakers talk more slowly. If it takes them a lot of sounds to get a concept across, they talk quickly.
  • NPR: Tracks, Equipment Left By Apollo Missions Visible In New Moon Photos
    New photos from the Lunar Reconnaissance Orbiter provide an aerial view of the site of the Apollo 12, 14, and 17 missions. The lunar module, the abandoned lunar rover, and astronauts' tracks across the surface are all visible.

Links for May 5th

  • Snopes: Obama Lends $2 Billion to Brazilian Oil Company
    Heard the one about how the President Obama is spending billions on offshore drilling…in Brazil? Snopes rates it “mostly false.” This is another case of conservatives getting riled up about something that's not true and dates from President Bush's time in the White House.
  • ThinkProgress: Exxon Makes $30.5 Billion, So GOP Votes Unanimously To Give Them Tax Breaks
    All the Republicans and 7 Democrats in the House voted to block a bill that would cut $1.8B in annual subsidies to the oil industry. Republicans voted unanimously to keep them in March, too. Remember, kids: welfare is bad, unless it's going to the world's most profitable industry.
  • NASA: Results of Epic Space-Time Experiment
    I love theoretical physics. Albert Einstein came up with all of these ideas about how space and time should work, based solely on doing math on paper, and as science catches up with him, we keep finding that he's right. In this case, Einstein forecast that mass should curve spacetime. For instance, the mass of Earth should cause the very fabric of the universe to twist and warp around it. By launching some gyroscopes into space seven years ago—containing the most perfect spheres ever made—and observing how their spin drifts, it was observed that Einstein's calculations were spot-on. NASA's work on the project began 47 years ago, culminating in this magnificent confirmation of how the universe works.