Space News & Blog Articles

With our continued failure to discover dark matter particles, it’s worth considering alternatives. While dark matter is the most widely supported model, the alternatives fall into two broad paths. One is that we should look to extended models of general relativity, such as conformal gravity. The other argues we should modify the very nature of Newtonian dynamics. The first approach tends to be popular with theorists since it focuses on an abstract theory in the same vein as Einstein’s original ideas. The second, often known as Modified Newtonian Dynamics, or MoND, tends to be more popular with observational astronomers.

In March 2022, astronomers announced the discovery of the farthest known star via an image taken by the Hubble Space Telescope. They named it Earendel, after the old English name for “morning star”. Now, JWST’s Near-infrared Camera (NIRCam) and its NIRSpec spectrometer have taken a look at the same star and revealed more details about it.

Lately, plenty of ideas have been floating around for methods to mine the Moon. That is undoubtedly partly due to the growing enthusiasm for Artemis, NASA’s lunar exploration program, and its planned support for a long-term human presence on the Moon. But what would make the best technique to get valuable material off the lunar surface? How about zapping it with lightning? That is the idea behind a NASA Institute for Advanced Concepts grant given to Dr. Amelia Grieg of the University of Texas at El Paso. And it seems to work.

Virgin Galactic sent its first privately funded adventurers — and its first space sweepstakes winners — past the 50-mile space boundary today.

Dark matter is one of the thorniest mysteries of modern cosmology. On the one hand, astronomers have gathered a wealth of supporting evidence through galaxy clustering statistics, gravitational lensing, and cosmic microwave background fluctuations, on the other hand, there are no particles in the standard model of particle physics that could account for dark matter, and we haven’t been able to detect its effect locally. It’s a solid theory where we just can’t seem to fully pin it down. That usually means we’re just a breakthrough away from confirming or overthrowing dark matter. The good news is that there are several projects searching for dark matter, and one of them, the IceCube Neutrino Observatory, has just released a new result.

A recent study published in the journal Geology attempts to interpret the patterns of dunes, which are sand mounds frequently formed by aeolian (wind) processes and range in size from small ripples observed on beaches to massive structures observed in the desert. Specifically, the researchers focused on patterns of dune crestlines, which are the top of the dunes. Different dune crestline patterns might appear as mundane features, but their formations are often the result of a myriad of influences, including climate change, surface processes, and atmospheric phenomena.

Is humanity alone in the Universe? Is anyone out there? Where is everybody? And what happens if and when we make contact with them? These and other questions were the subjects of the 2023 Penn State SETI Symposium hosted by the Penn State Extraterrestrial Intelligence Center (PSETI) from June 19th-22nd, 2023. The event featured prominent speakers from various research fields and disciplines discussing the challenges, history, and future of SETI. In the great tradition established by Dr. Frank Drake, they also addressed key issues related to the search for intelligent life and what we might find someday.

Exploration missions to the outer solar system are still sorely lacking, even though they were highly prioritized in the Planetary Science Decadal Survey from 2013-2022. In fact, many planets in the outer solar system have never even been orbited by a probe. For one in particular – Uranus – we must rely on data from Voyager 2, with instruments designed over 50 years ago, or Earth-based observations. Neither solution can genuinely understand the weird physics going on with this planet that is essentially lying on its side. And while there have been plenty of proposed mission architectures to go and look at it, it’s always fun to take a look at a new one when it pops up. A team from Stanford came up with a new concept called the Sustained CubeSat Activity Through Transmitter Electromagnetic Radiation (SCATTER). It was given a NASA Institute for Advanced Concepts grant to develop the idea further. They released a paper a little while ago, and it’s worth digging into here.

Nearly every galaxy in the universe contains a supermassive black hole. Even galaxies that are billions of light years away. This means supermassive black holes form early in the development of a galaxy. They are possibly even the gravitational seeds around which a galaxy forms. But astronomers are still unclear about just how these massive gravitational beasts first appeared.

Don’t miss one of the best meteor displays of 2023, as the Perseids peak this coming weekend.

The Ingenuity helicopter continues to explore the landscape around Jezero Crater on Mars, now more than 800 days into its original 30-day demonstration mission. Recently, Ingenuity completed its 54th flight on the Red Planet. However, things haven’t gone exactly to plan the past several weeks.

A day on Earth last about 24 hours. The word “about” in that sentence does a lot of heavy lifting because Earth’s rate of rotation changes all the time. Not by much, only fractions of milliseconds, but it means our common 24-hour day only really applies at human scales.

The basic idea of turning an asteroid into a rotating space habitat has existed for a while. Despite that, it’s always seemed relatively far off regarding technologies, so the concept hasn’t received much attention over the years. But, if you’re retired and have an underlying interest in researching space habitats, developing a detailed plan for turning an asteroid into one seems like a great use of time. And that is precisely what David W. Jensen, a retired Technical Fellow at Rockwell Collins, recently did. He released a 65-page paper that details an easy-to-understand, relatively inexpensive, and feasible plan to turn an asteroid into a space habitat.

It’s hard to believe, but Mars Curiosity Rover has been on Mars doing its thing for 11 years. And, so what’s it doing to celebrate? Heading up a hill, making one of its toughest climbs ever.

Graphene has long been put forward as a wonder material. Undeniably, it has astounding properties – stronger than steel, a better electrical conductor than copper, and lighter than almost anything else with similar properties. And while it’s been partially adopted into space-faring technologies, many use cases remain where a pure form of the material could dramatically benefit the space industry. To detail those opportunities, a group of scientists from the Italian Space Agency recently released a paper that looked at graphene’s role in space exploration – and where it might stand to make an even bigger impact shortly.

Astronomers have discovered a pair of star-like objects orbiting each other extremely quickly, with an entire ‘year’ lasting just 1.9 Earth hours. Catchily named ZTF J2020+5033, the system consists of one object which is definitely a small star, and another that straddles the boundary between star and planet. The two objects appear to be very old, and understanding how they came to be orbiting so close together is teaching astronomers more about how solar systems change and evolve.

One of the striking things about iron meteorites is that they are often magnetic. The magnetism isn’t strong, but it holds information about their origin. This is why astronomers discourage meteorite hunters from using magnets to distinguish meteorites from the surrounding rock, since hand magnets can erase the magnetic history of a meteorite, which is an important scientific record.

It’s sometimes hard to remember that meteorites have been hitting our planets for millions of years. And some of them are made of valuable materials such as titanium or iron. So, theoretically, at least, our bronze and iron age ancestors could utilize these ready-made metallic rocks without having to dig underground to access them, like they would with regular tin or iron veins. Now, a new study of an arrowhead made out of a meteorite points out just how valuable iron age society thought these meteorites were and hints at a trade network that reached farther than archeologists initially thought.

Additive manufacturing is slowly becoming more and more useful as the technology improves. One of the places it continues its development is in the realm of space exploration. It has long been mooted as an integral part of any in-situ resource utilization (ISRU) efforts and is especially important for ensuring early explorers on the Moon have the right tools and materials they need to survive. The European Space Agency is supporting that research effort, as their Technology Development Element fund supported work by an Austrian company called Incus to develop a 3D printing solution that could reprint metal parts on the Moon.

Nearly two million years ago a species of upright apes known as homo erectus began to utilize fire. It was a gradual process, from opportunistic users of natural fires to masters able to craft flames from flint and tender. We are their descendants. We are creatures of forge and kiln, hearth and home. Fire has become so central to us that instead of homo sapiens, we could call ourselves homo ignus, the fire-wielding ape. Fire is central to the rise of our civilization. It cooks our food, keeps us warm, and illuminates our night. This raises an interesting question. Could we have built a civilization without fire?

What’s better than one lunar rover? Three lunar rovers! In 2024, NASA plans to send a team of suitcase-sized wheeled robots to the Moon as part of the Commercial Lunar Payload Services (CLPS) program. Collectively called CADRE – Cooperative Autonomous Distributed Robotic Exploration – the rovers will spend one full lunar day (14 Earth days) exploring the Moon and showing off their unique capabilities.