Space and astronomy news
There is a region of the sky where astronomers fear to look. Filled with dark clouds of dust, it hides an unseen mass. A mass so large it is pulling the Milky Way and other galaxies toward it…
Continue reading “Astronomers Defy the Zone of Avoidance to Find Hundreds of New Galaxies”
Filmmakers love New Zealand. Its landscapes evoke other worlds, which explains why so much of The Lord of the Rings was filmed there. The country has everything from long, subtropical sandy beaches to active volcanoes.
The country’s otherworldliness extends into its atmosphere, where a cloud nicknamed the “Taieri Pet” forms when conditions are right.
Continue reading “An Otherworldly Cloud Over New Zealand”
The theory goes that black holes accrete material, often from nearby stars. However the theory also suggests there is a limit to how big a black hole can grow due to accretion and certainly shouldn’t be as large as they are seen to be in the early Universe. Black holes it seems, are fighting back and don’t care about those limits! A recent study shows that supermassive black holes are growing at rates that defy the limits of current theory. Astronomers just need to figure out how they’re doing it!
Continue reading “Early Black Holes Fed 40x Faster than Should Be Possible”
Eventually, every stellar civilization will have to migrate to a different star. The habitable zone around all stars changes as they age. If long-lived technological civilizations are even plausible in our Universe, migration will be necessary, eventually.
Could Extraterrestrial Intelligences (ETIs) use stars themselves as stellar engines in their migrations?
Continue reading “A Spider Stellar Engine Could Move Binary Stars Halfway Across a Galaxy”
Putting humans on Mars has been one of NASA’s driving missions for years, but they are still in the early stages of deciding what exactly that mission architecture will look like. One major factor is where to get the propellant to send the astronauts back to Earth. Advocates of space exploration often suggest harvesting the necessary propellant from Mars itself – some materials can be used to create liquid oxygen and methane, two commonly used propellants. To support this effort, a group from NASA’s COMPASS team detailed several scenarios of the infrastructure and technologies it would take to make an in-situ resource utilization (ISRU) system that could provide enough propellant to get astronauts back to a Mars orbit where they could meet up with an Earth return vehicle. However, there are significant challenges to implementing such a system, and they must be addressed before the 8-9-year process of getting the system up and running can begin.
Continue reading “Scaling Propellant Production on Mars is Hard”
There are good reasons to keep an eye on the Leonid meteors this year.
It’s still one of the coolest things I ever saw. I was in the U.S. Air Force in the 90s, and November 1998 saw me deployed to the dark skies of Kuwait. That trip provided an unexpected treat, as the Leonid meteors hit dramatic storm levels on the morning of the 17th. Meteor came fast and furious towards local sunrise, often lighting up the desert floor like celestial photoflashes in the sky.
Once every 33 years or so, the ‘lion roars,’ as Leonid meteors seem to rain down from the Sickle asterism of the constellation Leo. And while the last outbreak was centered around the years surrounding 1999, there’s some interesting discussion about possible encounters with past Leonid streams in 2024.
Continue reading “Is an ‘Off-Year’ Leonid Outburst in the Cards For November?”
Rarely does something get developed which is a real game changer in space exploration. One example is the Skylon reusable single-stage-to-orbit spaceplane. Powered by the hypersonic SABRE engine it operates like a jet engine at low altitude and more like a conventional rocket at high altitude. Sadly, ‘Reaction Engines’ the company that designs the engines has filed for bankruptcy.
Continue reading “Reaction Engines Goes Into Bankruptcy, Taking the Hypersonic SABRE Engine With it”
The dream of traversing the depths of space and planting the seed of human civilization on another planet has existed for generations. For long as we’ve known that most stars in the Universe are likely to have their own system of planets, there have been those who advocated that we explore them (and even settle on them). With the dawn of the Space Age, this idea was no longer just the stuff of science fiction and became a matter of scientific study. Unfortunately, the challenges of venturing beyond Earth and reaching another star system are myriad.
When it comes down to it, there are only two ways to send crewed missions to exoplanets. The first is to develop advanced propulsion systems that can achieve relativistic speeds (a fraction of the speed of light). The second involves building spacecraft that can sustain crews for generations – aka. a Generation Ship (or Worldship). On November 1st, 2024, Project Hyperion launched a design competition for crewed interstellar travel via generation ships that would rely on current and near-future technologies. The competition is open to the public and will award a total of $10,000 (USD) for innovative concepts.
Continue reading “Project Hyperion is Seeking Ideas for Building Humanity’s First Generation Ship”
Supermassive Black Holes (SMBHs) can have billions of solar masses, and observational evidence suggests that all large galaxies have one at their centres. However, the JWST has revealed a foundational cosmic mystery. The powerful space telescope, with its ability to observe ancient galaxies in the first billion years after the Big Bang, has shown us that SMBHs were extremely massive even then. This contradicts our scientific models explaining how these behemoths became so huge.
How did they get so massive so early?
Continue reading “How Did Supermassive Black Holes Get So Big, So Early? They Might Have Had a Head Start”
A town in the Austrian Alps might not seem like the most conducive place to come up with daring space missions. But, for the last 40 years, students and professors have been gathering to do just that in Alpbach, just north of the Lichtenstein/Austrian border. One outcome of the Alpbach Summer School this year was an idea for a combined Neptune / Triton explorer mission to take advantage of existing technology developed for the JUICE missions. Before we get into the technical details of the mission, though, let’s dive into why scientists should care about the Neptunian system in the first place.
Continue reading “A Mission to Triton and Neptune Would Unlock Their Mysteries”