Artemis II launch live updates as NASA moon mission counts down to historic flight

A thousand people have already convened in Space View Park, a riverside park in the city of Titusville, Florida, which is a popular sightseeing location for NASA launches. From 15 miles away, it offers visitors a clear view of the launch pad.

Teams are continuing to make progress as they fuel the rocket. NASA said crews successfully completed the topping phase for its liquid hydrogen tank, which the agency called "a critical step" that ensures the tank reaches full capacity, and have since moved on to "replenish mode." That's when small amounts of liquid hydrogen and liquid oxygen are continuously added to tanks in order to counteract natural evaporation. 

There are about 500 launch commit criteria, a strict set of rules and conditions that must be met for Artemis II to launch. A violation of any one of the launch commit criteria could halt the countdown or scrub the launch.

In some cases, the launch director, in consultation with the Mission Management Team, could choose to waive certain criteria if they have flight rationale, or justification and evidence demonstrating that it would be safe to proceed.

Some 12,000 different measurements are being monitored in real-time.

Spectators have been camping out near the Kennedy Space Center in hopes of catching a glimpse of the launch later today. 

"This, to me, is history," one of them told CBS News. "Watching this, if these astronauts go up and do what they're going to do, it's going to be just awesome."

Another said he remembered watching coverage of the Apollo flight as a child, on a black-and-white TV, and was determined to see this one in person. 

The Artemis crew is "in great spirits" ahead of their scheduled launch, retired NASA astronaut and ISS commander Leroy Chiao told CBS News on Wednesday morning, shortly after the crew members woke up.

"The crew is very relaxed," Chiao said. "They've been training for a long time. They've been looking forward to this day for a long time."

Watch the full interview here.

NASA says the four Artemis II astronauts have officially begun their launch day with a scheduled wake-up call at 9:25 a.m. EDT, marking the start of their final preparations for launch.

They'll have a meal, attend a weather briefing, and then head to the suit-up room at around 12:50 p.m. to put on their orange Orion Crew Survival System suits.

They're scheduled to depart for the launch pad about 4 hours, 40 minutes before launch. But their departure time could be a moving target depending on whether the launch team encountered any delays with propellant loading.

When it's time to go, the crew will ride the 11 miles to Pad 39B in an Airstream vehicle called the Astrovan II. The trip takes about 20 minutes.

The crew will be carrying green bags containing their suit helmets, gloves, communication caps, and any last-minute personal items such as reading glasses. 

They'll take two elevators to the 274-foot crew access level. At the end of the 60-foot-long crew access arm is the "white room," a small, environmentally controlled space used for final preparations, such as donning helmets and gloves. 

Then the astronauts will begin a roughly 40-minute process of getting strapped into their seats. 

Assisting them will be a five-person team known as the closeout crew, which is responsible for closing and performing leak checks on Orion's hatches and are the last people the astronauts see before launch.

The United States Coast Guard will close certain waterways around the Artemis launch site on Wednesday, the agency said, blocking or limiting mariners' access to areas around Cape Canaveral, Florida. 

In the hours leading up to launch, Coast Guard crews establish a "security zone," "safety zone" and "regulated navigation area," which cannot be transited without formal approval.

People are also advised to steer clear of waters outside of those designated areas for a window of time around the rocket's planned liftoff because "hazardous conditions may be present in event of a space vehicle malfunction," the Coast Guard said. Hazards could include falling debris or vehicle components that could damage vessels below.

A map illustrating the Coast Guard's restrictions is posted here.

Fueling the rocket is progressing as planned. NASA says the launch team transitioned to the fast fill of liquid hydrogen into the rocket's core stage, a step that brings the massive tanks closer to full capacity, after the slow fill of liquid hydrogen and liquid oxygen. 

So far, forecasters are predicting an 80% chance of favorable weather conditions at launch time, with some risk of clouds, wind and showers. Tonight's 2-hour window shows light winds, mostly clear skies and temperatures in the mid 70s.

There are very specific weather criteria that must be met for the launch to proceed:

• Temperatures must be above 41.4 degrees Fahrenheit and cannot rise above 94.5 degrees for longer than 30 minutes.
• Winds cannot exceed 33 mph at 132.5 feet and cannot exceed 45 mph at 457.5 feet.
• There cannot be liftoff for at least 30 minutes after lightning strikes within a 10 mile radius.
• Thunderstorm clouds (cumulonimbus) must be more than 3 miles away, clouds over 4,500 feet thick must be more than 5 miles away, cumulus clouds must be more than 10 miles away, and there cannot be any smoke plumes nearby.
• There cannot be any precipitation falling.

In the first major decision point of the day, NASA says the launch team has polled "go" to begin tanking the Space Launch System (SLS) rocket. At 8:29 a.m. EDT, they will begin filling the vehicle with about 756,000 gallons of cryogenic liquid propellant.

The core stage will be filled with:

• 537,000 gallons of liquid hydrogen (LH2) chilled down to -423° Fahrenheit
• 196,000 gallons of liquid oxygen (LOX) chilled down to -297° Fahrenheit

The upper stage, or Interim Cryogenic Propulsion Stage (ICPS), will be filled with:

• 17,000 gallons of chilled liquid hydrogen (LH2)
• 5,000 gallons of chilled liquid oxygen (LOX)

Artemis II is "a test flight," NASA Administrator Jared Isaacman noted in an interview with CBS News the day before launch. "This is the opening act in a series of missions that will send astronauts to and from the moon with great frequency as we return to stay." 

NASA intends to follow it up with additional flights next year, at least one lunar landing in 2028 and longer-term construction of a moon base.

"This first mission, this is extremely challenging," Isaacman said. 

"These astronauts are going to go farther from Earth than any humans have ever been before, potentially faster than any humans have ever been before."

Watch the full interview here.

The four crew members chosen for the Artemis II mission stand out even in a NASA astronaut corps full of super achievers. They've spent the past three years training for the days ahead.

Mission commander Reid Wiseman, 50, holds a degree in computer and systems engineering and a master's in systems engineering. He became a naval aviator in 1999 and joined NASA's astronaut corps in 2009. Wiseman first flew in space in 2014, logging 165 days in orbit aboard the International Space Station and completing two spacewalks.

Artemis II pilot Victor Glover, 49, is a U.S. Navy captain with an engineering degree and three master's degrees in military aviation, systems engineering and management. He has flown more than 400 carrier flights and 24 combat missions, and piloted a SpaceX Crew Dragon flight to the International Space Station in 2020-21, logging 168 days in orbit and completing four spacewalks.

Mission specialist Christina Koch, 47, worked as an electrical engineer at NASA's Goddard Space Flight Center, conducted research in Antarctica and helped develop scientific instruments for space probes. An astronaut since 2013, she logged 328 days in space aboard the International Space Station in 2019-20 — the longest single spaceflight by a woman — and has conducted six spacewalks.

Mission specialist Jeremy Hansen, 50, is the only spaceflight rookie on the team. He is from Canada and will be the first Canadian astronaut ever to travel beyond near-Earth orbit. He learned to fly as a teen, earned a degree in space science at Royal Military College, and became a fighter pilot before joining the Canadian Space Agency in 2009.

Read more here.

Artemis II is a flight to the moon — but the astronauts will not land on the moon or go into orbit around it. Instead, they will loop behind it and get an unprecedented view of the far side of the moon. 

In the process, they're expected to set a record for the farthest distance humans have ever traveled from Earth: 252,000 miles. 

The crew will spend their first 24 hours after launch in an elliptical orbit around the Earth. Then, if all goes according to plan, a crucial engine firing called the "trans-lunar injection," or TLI, will boost the ship's velocity by about 900 mph, just enough to push it out of Earth orbit to begin the four-day coast to the moon. 

The spacecraft will be on a "free return" trajectory, using lunar gravity to bend the ship's path back toward Earth, where it will return for splashdown in the Pacific Ocean on April 10.

Artemis II originally planned to take off in early February, but the flight was delayed repeatedly.

The first setback came in the form of hydrogen fuel leaks during a dress-rehearsal countdown. Then problems arose with the upper stage propellant pressurization system. 

NASA says both issues have been resolved, finally clearing the way for launch. 

More than 48 hours before liftoff, the official countdown clocks began ticking at 4:44 p.m. EDT Monday afternoon.

CBS News 24/7 will have live streaming coverage starting at 4 p.m. EDT for the countdown to the launch. Watch live in the video player on this page or download the free CBS News app.

• What: NASA launches the Artemis II mission to fly astronauts around the moon.
• Date: Wednesday, April 1, 2026.
• Time: Launch window opens at 6:24 p.m. EDT.
• Location: Kennedy Space Center, Florida.
• On TV: A CBS News Special Report anchored by Tony Dokoupil airs on CBS television stations starting at 6 p.m. EDT. Find your local station here.
• Online stream: Watch live on CBS News in the video player above and on your mobile or streaming device. 

Coverage plans subject to change.