Professor of Planetary Astronomy, California Institute of Technology
Assistant Professor of Planetary Astronomy at the California Institute of Technology and author of How I Killed Pluto and Why It Had It Coming; discoverer of 2003 UB313, also known as 'Xena'
Move Over Pluto, Astronomers Say There's a New Planet in Town Ten years ago, astronomer’s shrunk the solar system by removing Pluto from the list of real planets. Now the solar system is getting bigger again.
Pluto Demoted Last year, astronomers at Cal Tech discovered an object they called Xena--even bigger than Pluto, and also orbiting around the Sun. That set off an astronomical controversy. Are there really 10 planets? Today, the International Astronomical Union said, "No." Xena isn't a planet at all, and neither is Pluto.
Pluto, Planet or Plan Not? Since Pluto's discovery in 1930, there have been nine planets in the solar system, but a year ago, scientists at the California Institute of Technology said there were ten. An object they called Xena turned out to be bigger than Pluto and was also orbiting around the Sun.
National Security: An Adult in the Room America’s mainstream media are obsessed with President Trump’s off-hand policymaking in military and foreign affairs. But his mistakes don’t justify the unquestioned authority given the Pentagon, the CIA and the FBI. William Arkin is quitting NBC News with a scathing assessment. He says the national security state has created a condition of “perpetual war” without making America safer--and that the media are failing to report it. L ater on our Climate Change Update segment: how the government shutdown is hurting American science.
What AMLO Means to Los Angeles Andrés Manuel Lopez Obrador has forged a special connection to Angelenos and Mexican-Americans.
