Okay, space fans. It’s almost time. NASA will launch the next-generation rocket and send it furiously beyond the Moon’s surface for the first ever time. This is going to be an exciting time. But, it’s also been quite a bit of activity here on Earth. If you are like me you may be looking for some quick information on the latest NASA rocket launch.
Consider this your SLS cheat sheet as NASA gears up for its big launch on August 29th.
What is SLS?
It stands for Space Launch System.
That seems like a very boring name.
It is. It is functional and useful, as the system allows for things to be launched into space.
What kinds of things can SLS launch?
So many things! This version of SLS has four big rocket engines and two solid-state boosters and can carry about 27 metric tons up to the general vicinity of the Moon. That’s more than the space shuttle could carry to low earth orbit but less than the Apollo-era Saturn V rocket could carry to the Moon. The future versions of SLS can haul more.
Whoa, how will it do that?
It’s going to light up like a 5. 75 million-pound firework. Those boosters — the twin white cylinders on either side of the rocket — are 17 stories high and are packed with a solid rocket fuel called polybutadiene acrylonitrile. They burn through six tons of this fuel every second, according to NASA. In case you were wondering what this is in relation to jumbo jets, NASA has you covered. Each one “generates more thrust than 14 four-engine jumbo commercial airliners.” The two boosters will generate 75 percent of the boom that gets the rocket and its cargo off the ground.
But that’s only part of the rocket’s power. There’s also the 212-foot-tall core stage — the big orange part of the rocket. On launch day, it will be packed with 537,000 gallons of liquid hydrogen and 196,000 of liquid oxygen, which will fuel the four engines at the bottom. All that engineering and fuel translate to an enormous amount of power. Within 8. 5 minutes of launch, SLS and Orion capsule that it’s carrying will be traveling at speeds of around 17,000 miles per hour.
What is the Orion capsule?
Orion was designed to be used in missions outside of Earth’s orbit. It could also have potential destinations on Mars or the Moon. It’s got an extremely shiny look that will help it cope with extreme temperatures in space, a next-generation heat shield to cope with reentering the atmosphere, and a launch abort system that could blast astronauts to safety if anything went wrong during launch. In space, it can support four people on a mission for 21 days.
Orion flew to space before in a test flight in 2014. It’s been through a lot of testing since then in preparation for this next flight, which has been delayed many, many times. These delays will be discussed later. Back in 2020, it looked like there might be a chance that it would get delayed yet again when some engineers discovered a problem with a power component for the spacecraft. Trying to fix it would have taken months, and they have backup systems available, so they will be flying the spacecraft as-is.
Are there going to be people inside Orion?
Nope. There will be three mannequins strapped inside, which look varying degrees of terrifying. One is named Commander Moonikin Campos, and it will wear one of the flight suits that astronauts will wear on future missions. It will be accompanied by the limbless Helga and Zohar, which will carry radiation detectors to figure out how much radiation astronauts might be exposed to during a trip to the Moon. Zohar will be wearing a vest that can protect against radiation. Helga won’t. Good luck, Helga.
This entire launch will be a one-off test flight. This is why there won’t even be any astronauts aboard. It’s the first time that the SLS is having its big space debut, and putting people on a rocket before seeing if it can actually work feels like an extremely bad choice. (NASA very briefly considered doing exactly that, then decided against it.) Artemis I is about working with Orion and SLS to test their capabilities and push them beyond limits.
What is Artemis I?
Oh boy, yet another name! Artemis I is the mission that SLS and Orion are going on. The mission’s main goal is to ensure that Orion is able to work in space, and to return astronauts to Earth safely after it is completed. As a bonus, it will fly farther from Earth than any spacecraft designed for humans has ever flown before, reaching a distance of 280,000 miles away from Earth.
During the course of its 42-day mission, it will travel a grand total of about 1. 3 million miles, heading out to the Moon, then entering orbit around the Moon for several days before returning back to Earth. The maps of this mission look like an extremely large and very messy figure 8. If the launch goes as planned on August 29th, it should splash back down on Earth on October 10th.
Are there other Artemis missions?
Yep! If all goes well with Artemis I, NASA will move on to Artemis II, which will be the first flight of the SLS / Orion combo with crew on board. This mission will be the first to return crewed to the Moon since Apollo. However, the astronauts aboard won’t actually land on the Moon. They’ll orbit the Moon for awhile before returning to Earth.
The ultimate goal is for NASA to land the first woman on the Moon during the Artemis III mission, which is still in the works. In August, NASA announced several potential landing sites near the Moon’s South Pole.
Yeah, that’s ringing a bell. How long has this been in the works?
The Artemis program? Since 2019, when then-Vice President Mike Pence announced that NASA was headed back to the Moon and would get there by 2024.
Fun fact! It got its name because in mythology, Artemis is the twin sister of Apollo, and there is just a ton of nostalgia for the Apollo missions, for better or for worse.
So are they going to make it back to the Moon by 2024?
Absolutely not. They’re shooting for 2025 at this point, but that’s still pretty ambitious.
What about the SLS project? It seems like this has been something I have heard about for a while.
You definitely have. Its origins date back to around 2010, when the US was shifting away from the space shuttle and toward other modes of space transportation. Parts of it started out as a project called Constellation that was canceled for being way too expensive. Then it was revived as SLS in 2010, with the goal of launching in 2017. That slipped to 2018 and kept slipping, as the project became notoriously delayed and over budget.
For a full look at the history, check out our story here.
But… they’re ready to go now?
Looks like it! Even though their dress rehearsal was cut short in June due to a hydrogen leak, engineers think that they’ve fixed all last-minute to-do’s for the rocket, and NASA has decided that it is a go for launch.
What else will be on board?
In addition to Helga, Zohar, and Commander Moonikin Campos, there will be a few other science experiments aboard Artemis I. During the mission, the spacecraft will deploy 10 small satellites called CubeSats. Some will map ice on the lunar surface, one will deploy a giant solar sail and head off to an asteroid, and one will attempt to land on the Moon. On board, there will also be a science experiment that will carry yeast where no yeast has gone before in an attempt to study deep-space radiation.
When is the SLS launch happening?
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