The bitterly fought Pluto wars of a few years back showed that even the experts disagree on what is and what isn’t a planet. One thing there’s no quarrel about, of course: a planet is, by definition, something that orbits a star.
Tag Archives: astronomers
NASA’s Dawn Spacecraft Is Approaching Asteroid Vesta
Schoolchildren by the thousands wept when Pluto was officially banished from the ranks of the major planets back in 2006, but for the asteroids, demotion to the interplanetary minor leagues is very old news. When Ceres was discovered in 1801 during a search of the mysteriously empty space between Mars and Jupiter, astronomers were convinced they’d found a new planet.
NASA crashes rocket, satellite into moon in search for water
NASA crashed a rocket and a satellite into the moon’s surface on Friday morning, a $79 million mission that could determine if there is water on the moon. NASA televised live images of the Lunar Crater Observation and Sensing Satellite, or LCROSS, as it crashed into a crater near the moon’s south pole.