How to watch tonight's Delta IV Heavy launch from Cape Canaveral with NASA solar probe

UPDATE: LIFTOFF of Delta IV Heavy with NASA's Parker Solar Probe at 3:31 a.m. Sunday! The rocket successfully launched on its second attempt after a scrub Saturday, taking the 1,400-pound probe on its way to the sun.

NASA's high-profile Parker Solar Probe mission will take flight tonight, launching from Cape Canaveral Air Force Station with ambitions targeted at unlocking the sun's mysteries.

Teams at Launch Complex 37 are targeting 3:33 a.m. Saturday for the liftoff of a massive Delta IV Heavy rocket, which will be the only United Launch Alliance heavy variant lifting off from the Space Coast this year. The window to launch the $1.5 billion mission closes at 4:38 a.m.

The forecast, according to the 45th Weather Squadron, looks favorable: 70 percent "go" during the window.

There are two parts to our coverage:

• Live video of the launch, available here or at our Facebook page.
• A live chat with space reporters James Dean and Emre Kelly.

Coverage kicks off at 2:30 a.m. Saturday at floridatoday.com/space and will feature in-depth coverage, photos, charts and more. You can ask the team questions and strike up a conversation. We'll host NASA's live video.

In central Florida?

If you're under clear skies, you can look to the state's east coast to spot Delta IV Heavy launch from Cape Canaveral.

If you do step outside for the launch, bring your smartphone and stay tuned to live updates. The coverage is available at floridatoday.com/space in your mobile browser.

Contact Emre Kelly at aekelly@floridatoday.com or 321-242-3715. Follow him on Twitter and Facebook at @EmreKelly.