SpaceX will be livestreaming the first attempted test flight of their big new Falcon Heavy booster (the world's most powerful rocket) today (Tuesday February 6) at 1:30 PM EST/10:3o AM PST (US time). http://www.spacex.com/webcast The live video should be here (whether it succeeds or blows up, it should be spectacular): Elon's nervous and he's not entirely confident it's going to work. https://arstechnica.com/science/2018/02/at-the-pad-elon-musk-sizes-up-the-falcon-heavys-chance-of-success/ When he showed up at the pad yesterday, he told a reporter from Ars Technica, "There's a lot that could go wrong," Musk admitted. "A really tremendous amount. I really like to emphasize that the odds of success are not super high. I don't want to jinx it -- I'm tempted to say. Because I feel super optimistic. But I feel as though that optimism has no basis in fact. I feel like we've got a two-thirds chance of success, but in reality we only have a 50-50-chance." "One of my biggest concerns is booster-to-booster interaction," Musk explained. "You've got a lot of dynamics going on there. Those rockets are very flexible; if they flex in unexpected ways they could potentially impact one another." "Going through the sound barrier, you get supersonic shockwaves. You could have some shockwave impingement, or where two shockwaves interact and amplify the effect, that could cause a failure as it goes transonic," There's a very cool animation of how the flight is intended to go (minus the possible explosions, but with a David Bowie soundtrack) showing the launch, the choreographed aerobatics of two of the boosters as they return to simultaneously land at Cape Canaveral (the third lands on a barge in the Atlantic), and finally Elon Musk's own personal Tesla sportscar, in an Earth-Mars Hohmann transfer orbit, steered by a very laid-back nonchalant (empty) spacesuit (one of SpaceX's stylish new designer suits), cruising past Mars and endlessly through interplanetary space for billions of years. (Until a flying saucer full of aliens finds it and they start waving their tentacles in consternation, that part's not shown.) Normally initial rocket tests ballast their rockets with hunks of concrete or blocks of metal to stand in for payload mass, but SpaceX is more whimsical. There's method to the madness of shooting it on a transfer orbit to Mars too, since one of the biggest markets for a heavy lift booster like this will be interplanetary space probes.