NASA’s Artemis II mission marks a new chapter in human deep-space exploration. After days of observations and extraordinary imagery, the crew brought back to Earth not only valuable scientific data, but also a new perspective on two particularly fascinating phenomena: the far side of the Moon and a solar eclipse observed from space.

A journey beyond every record

With an orbit that carried the astronauts as far as 400,171.4323 km from Earth, Artemis II surpassed the record set by Apollo 13, becoming the most distant crewed mission ever conducted. On board the Orion spacecraft, the four astronauts shared images and videos that allowed millions of people to experience the journey almost firsthand, drawing closer to the Moon which, in many ways, still remains shrouded in mystery.

Hello, world (Image Credit: NASA)

The far side of the Moon

During the sixth day of the lunar flyby on April 7–8, at an altitude of approximately 6,500 km above the surface, the crew was able to directly observe the so-called far side of the Moon, a region that is never visible from Earth. The images released reveal deep craters, ancient lava flows, and surface fractures that tell a complex geological story still under investigation. Particularly striking was the observation along the terminator: the line separating lunar day from night. In this region, the grazing sunlight casts long shadows, enhancing every surface detail: craters such as Jule, Birkhoff, and Stebbins stand out with a three-dimensionality that is impossible to perceive under full illumination.

Shadows at the Edge of Lunar Day (Image Credit: NASA)

The solar eclipse observed from space

One of the most extraordinary moments of the mission occurred when the Moon positioned itself between the Orion spacecraft and the Sun, producing a total solar eclipse observed directly from space. Unlike what happens on Earth, where the phase of totality lasts only a few minutes, the astronauts were able to admire the phenomenon for approximately 54 minutes.

From this vantage point, the Moon appeared large enough to completely cover the Sun. The scientific community is still investigating the origin of the glow visible around the lunar disk: it may be due to the solar corona, zodiacal light (caused by sunlight scattering off interplanetary dust), or a combination of both.

During the totality phase, several planets and faint background stars, normally invisible, were also visible against the darkened sky. In particular, images from the mission have made it possible to clearly identify Mars and Saturn, while other bright points may correspond to additional planets revealed by the dramatic drop in solar brightness.
The stars, although present, were not individually identified: their light appears more diffuse and less distinguishable compared to the planets, which are brighter and more easily recognizable during an eclipse observed from space.

A particularly fascinating detail was the faint glow of the lunar surface, illuminated by light reflected from Earth, a phenomenon known to amateur astronomers as Earthshine.

Artemis II in Eclipse (Image Credit: NASA)

To safely observe this event, the Artemis II crew used eclipse glasses similar to those developed by NASA for the 2023 and 2024 eclipses. This represents the first documented use of this type of protection during an eclipse observation near the Moon. It highlights a fundamental principle that also applies here on Earth: observing the Sun always requires appropriate equipment. Certified eclipse glasses remain the simplest and safest solution for experiencing such events without risk, both for enthusiasts and for those approaching astronomy for the first time.

Eclipse Safety First (Image Credit: NASA)

During this phase, there was also a communications blackout with NASA lasting approximately 40 minutes. This was not an unexpected issue, but a planned event: as the Moon passed between Orion and Earth, it temporarily blocked the radio signals of the Deep Space Network.

Scientific data

Beyond its visual spectacle, Artemis II has delivered a vast amount of scientific data. The crew:

• • documented impact craters and geological structures
• • analyzed variations in the color and brightness of the lunar surface
• • observed Earth’s sunrise and sunset
• • photographed the solar corona during the eclipse
• • detected six meteoritic impact flashes on the lunar surface

These observations will contribute to a deeper understanding of the Moon’s evolution and the processes that continue to shape it.

NASA’s Artemis II mission has reignited hopes for a possible human return to the Moon and opens new perspectives for the exploration of other planets in our Solar System. For astronomy enthusiasts, these images serve as an invitation to observe the sky with fresh eyes, encouraging us to wonder what other mysteries lie hidden within the universe.