NASA's Artemis II mission is days away from launching four astronauts on humanity's first trip to the Moon since 1972. The crew is in quarantine, the rocket is on the pad, and the countdown clock is ticking toward a historic April 1 liftoff.

This is the complete guide to everything you need to know.

Key Facts
  • **Launch date:** April 1, 2026 at 6:24 PM EDT (22:24 UTC)
  • **Launch site:** Pad 39B, Kennedy Space Center, Florida
  • **Mission duration:** 10 days, 1 hour, 42 minutes
  • **Farthest point:** 400,171 km from Earth — a new human record
  • **Splashdown:** Pacific Ocean, off the coast of San Diego

Meet the Artemis II Crew

Four astronauts will strap into the Orion capsule on April 1. Together, they represent a historic first: the most diverse deep-space crew ever assembled.

Astronaut Role Agency Notable First
G. Reid Wiseman Commander NASA Former Chief of the Astronaut Office
Victor J. Glover Jr. Pilot NASA First person of color on a lunar mission
Christina Koch Mission Specialist NASA First woman on a lunar mission
Jeremy Hansen Mission Specialist CSA First non-American on a lunar mission

Backup crew members Andre Douglas (NASA) and Jenni Gibbons (CSA) have trained alongside the primary four and are ready to step in if needed. The crew entered quarantine on March 18 to ensure they're healthy for launch.

"Human spaceflight is a relay race. That baton has been passed, generation to generation." — Victor Glover, Artemis II Pilot

The 10-Day Mission, Day by Day

Artemis II won't land on the Moon — that's Artemis III. Instead, this is a critical shakedown cruise: fly Orion around the Moon with humans aboard for the first time and bring them home safely.

Day 1 — Launch & Earth Orbit
SLS fires 8.8 million pounds of thrust, placing Orion into an elliptical orbit (115 × 44,525 miles). Crew manually pilots Orion near the spent upper stage to test handling.
Day 2 — Systems Check & TLI Burn
Full checkout of life support, navigation, and comms. The trans-lunar injection burn sends Orion toward the Moon.
Days 3–5 — Outbound Coast
Four-day journey through deep space. Crew runs emergency drills, tests radiation shielding, and performs course-correction burns.
Day 6 — Lunar Flyby
Orion passes within 4,600–6,400 miles of the lunar surface, swinging around the far side. The crew photographs terrain and tests deep-space navigation.
Days 7–9 — Return Journey
Orion uses the Moon's gravity assist to slingshot back toward Earth. Systems monitoring continues.
Day 10 — Reentry & Splashdown
Orion hits the atmosphere at 25,000 mph (Mach 32) using a "skip reentry" technique — bouncing off the upper atmosphere once to reduce heat loads before descending under parachutes into the Pacific.

The skip reentry is particularly important. During Artemis I in 2022, the uncrewed Orion's heat shield lost more material than expected. NASA has since modified the reentry trajectory to reduce stress on the thermal protection system.

The Rocket: SLS by the Numbers

8.8 million lbs
Maximum thrust at liftoff (15% more than Saturn V)
328+ feet
Total rocket height
5.74 million lbs
Fully fueled weight
25,000 mph
Reentry speed (Mach 32)
400,171 km
Farthest distance from Earth

The Space Launch System is the most powerful rocket ever built. Its core stage, built by Boeing, is powered by four RS-25 engines — the same design that flew on the Space Shuttle, upgraded for deep-space performance. Two solid rocket boosters from Northrop Grumman provide the majority of thrust during the first two minutes of flight.

The Orion spacecraft sitting on top was built by Lockheed Martin, with its service module — providing power, propulsion, air, and water — built by Airbus for the European Space Agency.

Who Built What

Component Contractor Role
SLS Core Stage Boeing Main rocket body + engines
Solid Rocket Boosters Northrop Grumman 75% of launch thrust
RS-25 Engines Aerojet Rocketdyne Four core-stage engines
Orion Capsule Lockheed Martin Crew module + heat shield
European Service Module Airbus / ESA Power, propulsion, life support

The Cost Question

Artemis is not cheap. And that's been a persistent source of criticism.

Total Artemis program
93
Cost overruns (SLS + Orion + ground)
6.8
Per-launch cost
4.1

Figures in billions of USD. Sources: NASA OIG, GAO-25-10710.

At an estimated $4.1 billion per launch, each SLS flight costs roughly what NASA spent on an entire year of Space Shuttle operations. The Government Accountability Office flagged $6.8 billion in combined cost overruns across SLS, Orion, and ground systems in a July 2025 report.

Pros
  • First crewed deep-space mission in 53 years
  • Tests critical systems for future Moon landings
  • Most diverse crew in spaceflight history
  • Validates Orion heat shield with humans aboard
  • Strengthens international partnerships (CSA, ESA)
Cons
  • $4.1 billion per-launch cost vs. SpaceX Starship at ~$100M
  • Heat shield concerns remain after Artemis I anomaly
  • No lunar landing — that waits for Artemis III/IV
  • Program is years behind original schedule
  • Inspector General questions long-term sustainability

The Heat Shield Debate

The elephant in the room: during Artemis I, Orion's heat shield charred unevenly, losing more ablative material than models predicted. NASA spent two years investigating.

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Former NASA astronaut and heat shield expert Dr. Charlie Camarda called the decision to fly with the current design "crazy." Engineer Dr. Danny Olivas described it as a "deviant heat shield — not the one NASA would want to give its astronauts."

NASA's solution: modify the reentry trajectory. Instead of a direct plunge, Orion will use the skip reentry technique to reduce peak heating. Administrator Jared Isaacman stated the agency has "full confidence in the Orion spacecraft and its heat shield, grounded in rigorous analysis."

The crew has accepted the risk. The question is whether the data from this flight will validate NASA's models — or force a redesign before Artemis III.

How to Watch the Launch

Online (free):

  • NASA TV and nasa.gov/live — full mission coverage starting hours before launch
  • Space.com live stream
  • YouTube: NASA's official channel

In person (Florida Space Coast):

  • Kennedy Space Center Visitor Complex — launch viewing packages are sold out
  • Public beaches — Cape Canaveral and Cocoa Beach offer direct sightline to Pad 39B. Arrive 4+ hours early; traffic will be extreme
  • Watch parties — Space Center Houston is hosting a launch day event with NASA commentary
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Launch windows run April 1–6, with a backup window on April 30. If weather or technical issues scrub April 1, NASA will attempt daily through April 6.

What Comes Next

If Artemis II succeeds, the next steps accelerate:

  • Artemis III — First crewed lunar landing since 1972, using SpaceX Starship as the lander
  • Artemis IV — First mission to the Lunar Gateway space station
  • Long-term goal — Sustainable human presence on and around the Moon by the 2030s

But everything hinges on the next 10 days. If Orion's heat shield performs, if the life support holds, if four humans can safely travel farther from Earth than any person in history — then the Moon is back in business.

The countdown is at T-minus 9 days.