NASA's Artemis II: Preparing for Human Return to the Moon

More than 50 years after the last human footsteps on the lunar surface during Apollo 17, NASA is set to launch Artemis II, the first crewed mission of its Artemis program. Although Artemis II will not land astronauts on the Moon, it represents a pivotal step toward future lunar landings. The mission aims to prepare for the eventual return of humans to the Moon, a goal that has not been achieved since December 1972.

Newsweek

Since the Apollo missions, the Moon has undergone subtle yet significant transformations. The most notable changes stem from ongoing impacts by meteoroids, as the Moon lacks an atmosphere to protect it from space debris. Data from NASA's Lunar Reconnaissance Orbiter (LRO), operational since 2009, indicate that thousands of new small craters have formed over the past decades. These impacts vary in size, with some capable of creating craters tens of meters wide.

Newsweek

In addition to impacts, the Moon's surface experiences a phenomenon known as "space weathering." This process, driven by micrometeorite strikes, solar radiation, and extreme temperature fluctuations, alters the texture and reflectivity of the lunar soil, or regolith. While the footprints left by Apollo astronauts remain visible, they are expected to degrade over thousands to millions of years.

Newsweek

Contrary to the perception of a geologically "dead" Moon, seismic activity persists beneath its surface. Instruments from the Apollo missions recorded moonquakes, which can be triggered by tidal forces from Earth or temperature changes on the lunar surface. Although these quakes are relatively weak compared to terrestrial earthquakes, some have been strong enough to cause minor shifts in surface material.

Newsweek

An unusual development on the Moon occurred in 2019 when Israel's Beresheet spacecraft crashed while carrying thousands of tardigrades—microscopic organisms known for their resilience in extreme conditions. This cargo was intended as a biological archive, and while some scientists speculate that a fraction of the tardigrades may have survived the impact, researchers emphasize that the Moon does not host active life. Without liquid water, these organisms cannot revive or reproduce, remaining in a dormant state.

Newsweek

NASA has highlighted the importance of Artemis II in paving the way for future lunar exploration. The agency continues to analyze Apollo-era seismic data to gain insights into the Moon's internal structure, which may inform upcoming missions.

Newsweek

While the Artemis program has garnered support for its ambitious goals, some critics question the allocation of resources toward lunar missions when pressing issues on Earth remain unaddressed. They argue that funds could be better spent on terrestrial challenges rather than space exploration.

Newsweek

As Artemis II approaches, NASA is preparing for a series of tests and evaluations to ensure the mission's success. This mission will serve as a foundation for future lunar landings, with the ultimate goal of establishing a sustainable human presence on the Moon.

Newsweek