Moon Archives

November 3, 2023November 3, 2023 by Evan Gough

Earth is Hiding Another Planet Deep Inside

During an ancient collision, the protoplanet named Theia slammed into Earth, leading to the creation of the Moon. But it left some of its remains inside Earth. Image Credit: CalTech

Earth’s early history is marked by massive collisions with other objects, including planetesimals. One of the defining events in our planet’s history, the formation of the Moon, likely resulted from one of these catastrophic collisions when a Mars-sized protoplanet crashed into Earth. That’s the Giant Impact Hypothesis, and it explains how the collision produced a torus of debris rotating around the Earth that eventually coalesced into our only natural satellite.

New research strengthens the idea that Theia left some of its remains inside Earth.

October 30, 2023November 9, 2023 by Matt Williams

Balloon Animals and Bouncy Castles on the Moon. The Case for Inflatable Habitats

Artist’s Conceptual Image of Inflatable Applications on the Lunar Surface. Credit: AMA Advanced Concepts Lab

Every year, NASA’s Breakthrough, Innovative, and Game-Changing (BIG) Idea Challenge invites student innovators to build and demonstrate concepts that can benefit future human missions to the Moon and beyond. This year’s theme is “Inflatable Systems for Lunar Operations,” which could greatly reduce the mass and stowed volume of payloads sent to the Moon. This is critical for the Artemis Program as it returns astronauts to the Moon for the first time since the Apollo Era over fifty years ago. It will also reduce the costs of sending payloads to the Moon, Mars, and other deep-space destinations.

October 29, 2023October 30, 2023 by Matt Williams

China Set Up a Tiny Farm on the Moon in 2019. How Did it Do?

A 3D reconstruction based on image processing and data analysis shows two cotton leaves grown in the Chang’e-4 lander on the far side of the moon. Image Credit: Chongqing University.

On January 3rd, 2019, China’s Chang’e-4 lander touched down on the far side of the Moon and deployed the Yutu rover. In addition to its many instruments, the rover carried an important science experiment known as the Biological Experiment Payload (BEP). Over the next eight days, this payload conducted a vital experiment where it attempted to grow the first plants on the Moon. Included in the payload were cotton, potato, arabidopsis, and rape seeds, along with fly eggs, yeast, and 18 ml (0.6 fluid oz) of water, which was kept at a constant atmospheric pressure.

The results of this experiment will help inform future Bioregenerative Life Support System (BLSS), which will prove vital to habitats and missions beyond Low Earth Orbit (LEO). A team of scientists from China recently released a study that reviewed the experiment, its results, and its potential implications for future missions to the Moon, Mars, and other deep-space locations. As they concluded, the experiment demonstrated that plants can grow on the Moon despite the intense radiation, low gravity, and prolonged intense light.

October 28, 2023October 29, 2023 by Matt Williams

China Showcases its Lunar Exploration Plans

A bootleg video appeared online that provides a detailed look at China's future plans for lunar exploration. Credit: Chen Junlong/Youtube

The China National Space Agency (CNSA) has drawn a lot of attention to its space programs in recent years. In addition to their Tiangong space station and crewed missions to Low Earth Orbit (LEO), there’s also been a lot of buzz surrounding the China Manned Space Agency (CMSA) and its Human Lunar Space Program. The high points have included the announcement of the International Lunar Research Station (ILRS) – a joint operation with Roscosmos – and shared concept art for their next-generation spacecraft and lunar lander.

As always, what we know about China’s plans for space exploration is limited to snippets of news, public statements, and the occasional video, which are the direct result of state-controlled media and tight secrecy regarding the country’s space program. The latest is a bootleg video that recently appeared online, which shows a video presentation that provides some insight into China’s long-term plans for crewed lunar exploration. The video is captioned with the words “China’s lunar space station and development of lunar molten cave base plan,” and it certainly lives up to that description!

October 24, 2023October 24, 2023 by Nancy Atkinson

The Moon is 40 Million Years Older Than We Thought

Apollo 17 astronaut Harrison Schmitt collecting a soil sample, his spacesuit coated with dust. Credit: NASA

An object the size of Mars crashed into the Earth over 4 billion years ago, creating a cloud of debris that formed the Moon. When the Apollo astronauts landed on the lunar surface, they found and brought back Moon rocks that helped pinpoint when this event happened. Now, a new study of crystals in the lunar samples pushed that event back even further –about 40 million years earlier than previous estimates — setting the Moon’s formation to about 4.46 billion years old – not long after the Earth formed.

October 17, 2023October 17, 2023 by Evan Gough

Building Roads Out of Moon Dust

This illustration shows an interlocking paved surface around a Moon base. Image Credit: ESA

Astronauts will face a host of obstacles when they visit the Moon again. There’s powerful radiation, wild temperature swings, and challenging gravity to deal with. There’s also dust and lots of it. Moondust was a hazard for the Apollo astronauts, and future lunar astronauts will have to contend with it, too.

What if they turn some of that dust into solid surfaces to drive on?

October 8, 2023October 8, 2023 by Matt Williams

Is This a Collapsed Lava Tube on the Moon?

The spectacular sinuous landform shown above is thought to be a collapsed lava tube located near Gruithuisen K crater. Credit: NASA/GSFC/ASU

The Moon was once a geologically active place characterized by volcanoes, lava flows, and a magnetic field generated by action in its interior. The Moon’s airless environment has perfectly preserved evidence of this past and can be seen today as dark deposits, volcanic domes, and cones. But the most recognizable features are known as “sinuous rilles,” which are believed to be ancient lava tubes that have since collapsed. The Lunar Reconnaissance Orbiter Camera (LROC) recently captured images of a rille that extended 48 km long (30 mi) across the northern hemisphere.

October 7, 2023October 7, 2023 by Nancy Atkinson

This Moon Rover Wheel Could be 3D Printed on the Moon

NASA mechanical design engineer Richard Hagen, left, and ORNL researcher Michael Borish inspect a lunar rover wheel prototype that was 3D printed at the Manufacturing Demonstration Facility. Credit: Carlos Jones/ORNL, U.S. Dept. of Energy

When you think about sending missions to the Moon, every single gram counts on launch day. Therefore, it makes sense to live off the land when you arrive with in-situ resource utilization. For example, what if you could fly a rover without wheels and 3D print them out of lunar regolith when you get there?

It just might happen.

Researchers used a 3D printer to build the same design for a wheel that will be part of the upcoming NASA VIPER rover. It was done using additive manufacturing (another word for 3D printing), melting metal powder and laying down and bonding a large number of successive thin layers of materials into the designed shape.

October 3, 2023October 4, 2023 by Nancy Atkinson

We Don't Know Enough About the Biomedical Challenges of Deep Space Exploration

Artist's impression of astronauts on the lunar surface, as part of the Artemis Program. Credit: NASA

Although humans have flown to space for decades, the missions have primarily been in low-Earth orbit, with just a handful of journeys to the Moon. Future missions with the upcoming Artemis program aim to have humans living and working on the Moon, with the hopes of one day sending humans to Mars.

However, the environments of the Moon and deep space present additional health challenges to astronauts over low-Earth orbit (LEO), such as higher radiation, long-term exposure to reduced gravity and additional acceleration and deceleration forces. A new paper looks at the future of biomedicine in space, with a sobering takeaway: We currently don’t know enough about the biomedical challenges of exploring deep space to have an adequate plan to ensure astronaut health and safety for the Artemis program.

October 1, 2023October 1, 2023 by Matt Williams

Astronomers are Working to Put a Radio Telescope on the Far Side of the Moon by 2025

This artist’s rendering shows LuSEE-Night atop the Blue Ghost spacecraft scheduled to deliver the experiment to the far side of the moon. Credit: Firefly Aerospace

The Moon will be a popular destination for space programs worldwide in the coming years. By 2025, NASA’s Artemis III mission will land the first astronauts (“the first woman and first person of color”) onto the lunar surface for the first time since the end of the Apollo Era, over fifty years ago. They will be joined by multiple space agencies, as per the Artemis Accords, that will send European, Canadian, Japanese, and astronauts of other nationalities to the lunar surface. These will be followed in short order by taikonauts (China), cosmonauts (Russia), and vyomanauts (India), who will conduct similarly lucrative research and exploration.

Having facilities in orbit of the Moon, like the Artemis Base Camp, the International Lunar Research Station, and others, will enable all manner of scientific research that is not possible on Earth or in Earth orbit. This includes radio astronomy, which would be free of terrestrial interference on the far side of the Moon and sensitive enough to detect light from previously unexplored cosmological periods. This is the purpose of a pathfinder project known as the Lunar Surface Electromagnetics Experiment-Night (LuSEE-Night) that will leave for the Moon next year and spend the next 18 months listening to the cosmos!