“If you love a flower found on a star” (Science Advent 22)

(Every day until December 25, I’m posting a science-related image or video and description.)

Day 22

The asteroid Vesta, as seen by the Dawn space probe. Vesta is the second largest asteroid in the Solar System. [Credit: NASA, JPL-Caltech, UCLA, MPS, DLR, IDA]

The asteroid Vesta, as seen by the Dawn space probe. Vesta is the second largest asteroid in the Solar System. [Credit: NASA, JPL-Caltech, UCLA, MPS, DLR, IDA]

“Asteroid” is a general term for a lot of small bodies in the Solar System, from chunks of rock and rubble up to substantial, very planet-like objects. The second category includes Vesta, recently visited and studied by the Dawn spacecraft. Vesta has sort of a squashed shape, more like a bread roll than a sphere, but Dawn’s measurement of its gravity shows that the asteroid has a differentiated interior: a core, mantle, and crust, much like Earth, the Moon, and the other rocky planets. Vesta even has traces of water, a result that is growing less newsworthy with each discovery that water is incredibly common in the Solar System.

Possibly the most famous asteroid, though, isn’t a real object. It’s the asteroid B-612, the dwelling place of the Little Prince in the mystical children’s book by French aviator Antoine de Saint-Exupéry. (OK, maybe the asteroids in The Empire Strikes Back are more famous, but none of them were named in the movie.) For my birthday in 2012, I wrote a little post about the science of the Little Prince’s asteroid, and just learned last week that the essay won a spot in the Open Lab anthology of the best science writing online!

Asteroid B-612 also gave its name to the B612 Foundation, an organization dedicated to finding asteroids that are potentially dangerous to Earth. While there’s no cause to panic, we know that big chunks of space rock have hit Earth in the past, and will do so again in the future. Locating and tracking asteroids that could possibly prove risky is an important job, one which we all should support.

Real asteroids may not be as poetic as B-612, but they are nevertheless beautiful objects in their way. We know there are billions of planets in the Milky Way, and studying asteroids is one way we can learn how those planets — including ours — came to be.

Si tu aimes un fleur qui se trouve dans une étoile, c’est doux, la nuit, de regarder le ciel. Toutes les étoiles sont fleuries. (If you love a flower found on a star, it is sweet at night to look at the heavens. All the stars are blooming.)
The Little Prince

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DrMRFrancis on Twitter

  • @fMRI_guy also the books by men that have been most important in my list were written by men of color 39 minutes ago
  • now which book in my to-read list is next? The one about white people as a group behaving terribly, the one about a… twitter.com/i/web/status/1… 40 minutes ago
  • RT @aux_clare: [bursts through the door, panting] the jumbo jet the canadian olympic equestrian team uses to transport their horses is call… 44 minutes ago
  • (that's out of 36 books. I have not made a goal of how many books to read this year, since I made one last year and failed miserably) 48 minutes ago
  • so far this year I've only read three books by straight* white men. It can be done! *presumably straight, I should say 50 minutes ago

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