Sign Up / Log In

Email Preferences

Sign Out

Create your free profile and get access to exclusive content.

Sign Up / Log In

Link your TV provider to stream movies, full episodes, and live TV.

All Posts Tagged

International Astronomical Union

An actual image of the protoplanet Hygiea, taken using the SPHERE camera on the Very Large Telescope. Credit: ESO/P. Vernazza et al./MISTRAL algorithm (ONERA/CNRS)

New observations show the asteroid Hygiea is round!

By Phil Plait |

3 years ago

Defining which rotation pole is north and which is south on a planet isn't as obvious as you think.

How do you know which pole of a planet is the north pole?

By Phil Plait |

3 years ago

Orbits of twelve new moons found for Jupiter (not to scale). Some orbit the same way Jupiter spins (blue), and others the opposite way (red). Credit: Carnegie Institution for Science / Roberto Molar Candanosa

Contest: Pick names for Jupiter's new moons!

By Phil Plait |

4 years ago

Pluto and Charon, to scale in size and brightness. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

Pluto's posse

By Phil Plait |

5 years ago