Marc Buie, Occultation Team Lead, reveals what we know so far about the shape of Ultima Thule as New Horizons races towards its encounter with the Kuiper Belt object.

Rocket Lab’s Electron rocket, a commercially-developed light-class booster, lifted off at 1:33 a.m. EST (0633 GMT) Sunday, carrying 13 CubeSats into orbit under contract to NASA.

A new launch date has been established — June 9 — for the Delta 4-Heavy rocket to carry a classified satellite into space for U.S. national security needs.