NASA's Nancy Grace Roman Space Telescope is set to launch Sunday, Aug. 30, from Kennedy Space Center in Brevard County aboard a SpaceX Falcon Heavy rocket. The mission, scheduled for 1:30 p.m. ET, will mark the first major space observatory launch from Florida since the James Webb Telescope in 2021. The telescope will study dark energy and search for exoplanets, expanding on the work of Hubble and Webb. Weather permitting, the launch will be visible from parts of Central Florida, though clouds could obscure the view. NASA and SpaceX will livestream the event on YouTube, NASA+, and Amazon Prime Video. The observatory is 42 feet long and 14 feet wide, with a 2.4-meter mirror similar to Hubble's. It will spend the next five years mapping the universe's expansion and scanning for distant planets. The mission is named after Nancy Grace Roman, NASA's first female chief of astronomy. Launch windows close at 4:30 p.m. ET. SpaceX will reuse a Falcon Heavy booster from a 2022 mission. The telescope's primary goal is to investigate dark energy, which makes up 70% of the universe. Scientists will use it to measure how galaxy clusters grow over time. The mission is expected to generate data for thousands of studies. Livestreams will include commentary from NASA engineers and SpaceX officials. The telescope will orbit the sun at a distance of 1 million miles from Earth, avoiding interference from Earth's atmosphere.