Update April 29th, 1:20PM ET: Private space company Blue Origin successfully conducted its eighth test flight of its New Shepherd rocket in Texas today. Despite being postponed twice this morning, the company launched and landed the booster rocket, while its crew capsule with a series of experiments softly landed minutes later.

On Sunday, private space company Blue Origin will launch its third New Shepard rocket, according to founder Jeff Bezos. The launch is scheduled to take place no earlier than 12:13PM EDT / 11:13AM CDT, and will be live streamed.

This will be the eighth overall flight for the New Shepard, and the second flight for this particular vehicle. The first launched on April 29th, 2015 (three years ago tomorrow), but crashed. Blue Origin then successfully launched and landed its second New Shepard in November that year, and proceeded to reuse the booster for four additional launches through October 2016 before retiring it. The company launched and recovered its third rocket in its only launch of 2017 in December, and that’s the vehicle that’s being launched tomorrow.

Launch preparations are underway for New Shepard’s 8th test flight, as we continue our progress toward human spaceflight. Currently targeting Sunday 4/29 with launch window opening up at 830am CDT. Livestream info to come. @BlueOrigin #GradatimFerociter pic.twitter.com/zAYpAGWB8C — Jeff Bezos (@JeffBezos) April 27, 2018

Blue Origin announced that this launch will once again include its aptly-named crash dummy, Mannequin Skywalker, which will gather data on astronaut telemetry and some scientific studies. The payload will also include a sensor suite that will collect data on the pressure, noise, and environmental data in the capsule, the Schmitt Space Communicator, designed to provide Wifi to commercial space customers, as well as a series of scientific experiments.

Mannequin Skywalker is ready for his 2nd mission on board New Shepard. He’s a little sensitive about being called a “dummy”, as he will be conducting astronaut telemetry and science studies – a very important job! pic.twitter.com/h2ncpGWaTi — Blue Origin (@blueorigin) April 28, 2018

The New Shepherd rocket will eventually bring passengers into space, taking them on an 11-minute flight in a capsule that will land with the help of parachutes, while the booster comes back down with a powered landing. Blue Origin has ambitions beyond just taking space tourists to orbit: it showed off its plans for its New Glenn rocket last year, ferrying cargo into orbit after it launches sometime in 2020 for the first time.

Blue Origin intends to conduct its first crewed flights for the New Shepard sometime later this year, and CEO Bob Smith said last year that his company was planning on sending its first passengers into space by 2019.

Update, April 29, 2018, 8:30AM ET: Added information on the New Shepard’s payload.

Update, April 29, 2018, 9:00AM ET: Updated launch time after Blue Origin delayed launch due to thunderstorms.

Update, April 29, 2018, 9:00AM ET: Updated launch time after second delay.