Photos: Predawn launch of Atlas 5

The last two spacecraft in a four-satellite constellation of tropical cyclone research platforms took off late Thursday from New Zealand on a Rocket Lab Electron launcher, helping ensure NASA’s TROPICS mission is ready for observations in time for the peak of this year’s Atlantic hurricane season.

A United Launch Alliance Delta 4-Heavy rocket, crowned by a solid-fueled upper stage kick motor, will send NASA’s Parker Solar Probe on a speedy voyage through the inner solar system following liftoff from Cape Canaveral.

SpaceX rolled a Falcon Heavy rocket back to its launch pad in Florida Tuesday night for liftoff Thursday with a high-power Viasat broadband satellite, following an eight-day delay for a launch vehicle engine swap.