Universe Today

December 18, 2022December 18, 2022 by Andy Tomaswick

Could Space-based Satellites Power Remote Mines?

Many space-based technologies are still looking for their “killer app” – the thing that they do better than anything else and makes them indispensable to whoever needs to have that app to solve a problem. At this point in the development of humanity, most of those killer apps will involve solving a problem back on Earth. Space-based solar power satellites are certainly one of those technologies.

They have the potential to fundamentally transform the energy industry here on Earth. But they need that one “killer app” to get people interested in investing in them. A study from a group of researchers at the Colorado School of Mines looked at one potential use case – powering remote mining sites that aren’t connected to any electric grid. Unfortunately, even at those extremes, solar power satellites aren’t yet economical enough to warrant the investment.

December 17, 2022December 17, 2022 by Anton Pozdnyakov

Accident on the ISS, JWST Deep Field, Space Habitat Goes BANG!

Splashdown! Artemis I has returned home. Webb has made its first Deep Field survey. Listen to the sound of a dust devil on Mars, and a Space journalist is going to the Moon.

December 16, 2022December 16, 2022 by Matt Williams

Aztecs Used an Extremely Accurate Solar Observatory to Manage Their Farming

Stone causeway atop Mount Tlaloc, Mexico. Credit: Ben Messiner/UCR

Pre-Columbian Mexico (or Mesoamerica) hosted one of the largest civilizations and populations in the world. The most well-known and dominant of these civilizations (prior to the arrival of the Conquistadors) were the Aztecs (or Mexica). Their empire, known as the Triple Alliance, was centered around Lake Texcoco and consisted of the major cities Tenochtitlan, Texcoco, and Tlacopan. In addition to engineering massive temples, aqueducts, canal systems, and estuaries, the Aztecs are renowned for being accomplished astronomers and agronomists.

At the height of their power, the Aztec Empire supported a population of up to 3 million in the Valley of Mexico, and many of their largest cities had populations exceeding 100,000. This was not easy, given that the region is characterized by arid springs followed by winter monsoons. According to recent research by the University of California Riverside (UCR), the Aztecs used mountain alignments as a solar observatory to create an accurate agricultural calendar. This allowed their farmers to produce enough food to feed one of the most densely-populated regions on Earth.

December 16, 2022December 16, 2022 by Evan Gough

Are Planets Tidally Locked to Red Dwarfs Habitable? It’s Complicated

habitable exoplanet interstellar message — Artist's impression of the exoplanet Ross 128 b orbiting its red dwarf star. Potetentially habitable rocky worlds like this one are beyond our physical reach. Image Credit: ESO/M. Kornmesser. Public Domain

Astronomers are keenly interested in red dwarfs and the planets that orbit them. Up to 85% of the stars in the Milky Way could be red dwarfs, and 40% of them might host Earth-like exoplanets in their habitable zones, according to some research.

But there are some problems with their potential habitability. One of those problems is tidal locking.

December 16, 2022March 4, 2023 by Carolyn Collins Petersen

Juno has Been Touring Jupiter’s Moons on its Extended Mission. Next Stop: Volcanic Io

The Juno mission's infrared view of the Jovian moon Io. Taken on July 5, 2022. All the hotspots are volcanic features. Courtesy NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM

For a tiny moon orbiting a giant planet, Io sure packs a giant wallop. It’s the most volcanic world in the solar system. Due to that extreme volcanism, scientists with the Juno mission are now focusing the spacecraft’s instruments and cameras on Io. They want to know more about its eruptions and how its constant stream of material into space interacts with Jupiter’s magnetosphere.

December 15, 2022December 15, 2022 by Alan Boyle

Avatars Return to the Movies — and Find a Real-Life Foothold

In the form of a Na'vi avatar, Jake Sully rides an alien flying fish in "Avatar: The Way of Water." (20th Century Studios)

Thirteen years after the original “Avatar” movie came out, the idea of human minds inhabiting alien bodies is returning for an amped-up sequel — and since 2009, real-life efforts to create robotic avatars have advanced at least as much as computer-aided filmmaking has.

Oscar-winning director James Cameron’s “Avatar: The Way of Water” returns to Pandora, a far-off exomoon where the peaceful, blue-skinned Na’vi people are menaced by human invaders who are capable of getting into their skin. The film is a visual mind-blower, combining elements of underwater documentaries, video games and the movie that earned Cameron his Oscar: “Titanic.”

The idea of a human taking charge of an alien body via virtual reality is pure science fiction — but if you replace the fictional Na’vi with a robot, you get the premise for the ANA Avatar XPRIZE, which gave out its top awards at the $10 million competition’s finals in November.

In the latest episode of the Fiction Science podcast, we focus on the parallels between the science-fiction vision embodied in the Avatar movies and the future-tech vision that roboticists are pursuing through the Avatar XPRIZE and other efforts. Someday, robotic avatars could well transform space exploration as well as life back here on Earth.

December 15, 2022December 15, 2022 by Evan Gough

NOAA’s New Weather Satellite is Operational, and its Pictures of Earth are Gorgeous

Polar-orbiting satellites capture swaths of data throughout the globe, and observe the entire planet twice each day. The global mosaic, captured by the VIIRS instrument on the recently launched NOAA-21 satellite, is a composite image created from these swaths. Image Credit: NOAA STAR VIIRS Imagery Team.

You’d have to be in some kind of sense-of-wonder-repressed coma not to appreciate satellite images of Earth. If you are, then images from the NOAA’s newest satellite might pull you out of it.

And they’re only a taste of the fascinating images that it will provide.

December 15, 2022December 16, 2022 by Evan Gough

Earth’s Water is 4.5 Billion Years Old

A protosolar disk is the disk of material around a young stellar object that isn't yet a star. It's called a protoplanetary disk once the star has formed and begun fusion. Planetesimals are the building blocks of planets and are present in both stages of a disk's evolution. Image Credit: NASA/JPL

The origin of Earth’s water has been an enduring mystery. There are different hypotheses and theories explaining how the water got here, and lots of evidence supporting them.

But water is ubiquitous in protoplanetary disks, and water’s origin may not be so mysterious after all.

December 15, 2022December 15, 2022 by Carolyn Collins Petersen

A Soyuz Capsule on ISS is Leaking Coolant Into Space

Soyuz leak — A screen grab from a video taken at the International Space Station of a coolant leak from the Soyuz spacecraft. Courtesy NASA.

There is an ongoing incident at the International Space Station involving a coolant leak from a docked Soyuz MS-22 crew ship. Just as Roscosmos cosmonauts Sergey Propokyev and Dmitri Petelin were getting ready to do a spacewalk to relocate a radiator, ground teams in Moscow noticed the leak. The spacewalk was cancelled immediately.

December 15, 2022December 15, 2022 by Nancy Atkinson

Here's a new Image of the Carina Nebula From Hubble

The Carina Nebula is an enormous stellar nursery about 7,500 light-years from Earth in the southern constellation Carina, the Keel. Credits: NASA, ESA, A. Kraus (University of Texas at Austin), and ESO; Processing: Gladys Kober (NASA/Catholic University of America)

Like a famous (and photogenic) actor followed by paparazzi, the Carina Nebula is one of the most photographed objects in space because of its stunning beauty. Over the years, the Carina Nebula has been one of the Hubble Space Telescope’s most-imaged objects.