A Harvard physicist has detailed his planned expedition to Papua New Guinea with the ambitious task of gathering remnants of a meteorite that he believes could be an alien probe.
Avi Loeb who is head of the Galileo Project, the “Systematic Scientific Search for Evidence of Extraterrestrial Technological Artifacts”, hopes to find fragments CNEOS1 2014/01/08 which crashed into Earth back in 2014 during the $1.5 million mission trip he organised to visit the Pacific island nation.
A team of Rutgers University scientists dedicated to pinpointing the primordial origins of metabolism – a set of core chemical reactions that first powered life on Earth – has identified part of a protein that could provide scientists clues to detecting planets on the verge of producing life.
The research, published on March 10 in the journal Science Advances.
<em>Science Advances</em> is a peer-reviewed, open-access scientific journal that is published by the American Association for the Advancement of Science (AAAS). It was launched in 2015 and covers a wide range of topics in the natural sciences, including biology, chemistry, earth and environmental sciences, materials science, and physics.
When pondering the probability of discovering technologically advanced extraterrestrial life, the question that often arises is, if they’re out there, why h…
“Modern satellite technology will allow us to explore our celestial backyard.”
The University of Sydney and Bulgarian aerospace manufacturer EnduroSat have teamed up to search for alien life in our nearest star system, Alpha Centauri.
The plan for the TOLIMAN mission is to search for planets in the habitable zone around two Sun-like stars in the system, Alpha Centauri A and B, which are located four light-years from Earth.
ESA
The new mission was dubbed TOLIMAN after the star’s ancient Arabic name. It was backed by Breakthrough Initiatives, which is also responsible for a mission that aims to one day send a light sail probe to the star system.
The Wow! signal is a radio signal detected by astronomer Jerry R. Ehman on August 15, 1977, while he was analyzing data from Ohio State University’s Big Ear radio telescope.
When the astronomer discovered the signal, he was so impressed with it that he wrote a comment “Wow!.” Thus, the mysterious signal came to be called the Wow! signal.
The signal appeared to come from the Sagittarius constellation, and it lasted for 72 seconds. The signal was unusual because it had a narrow bandwidth, was significantly stronger than background noise, and appeared to come from a fixed point in space.
There’s a theory that’s in vogue in astrochemistry called “Assembly Theory.” It posits that highly complex molecules—many acids, for example—could only come from living beings. The molecules are either part of living beings, or they’re things that intelligent living beings manufacture.
If Assembly Theory holds up, we could use it to search for aliens—by scanning distant planets and moons for complex molecules that should be evidence of living beings. That’s the latest idea from Assembly Theory’s originator, University of Glasgow chemist Leroy Cronin. “This is a radical new approach,” Cronin told The Daily Beast.
But not every expert agrees it would work—at least not anytime soon. To take chemical readings of faraway planets, scientists rely on spectroscopy. This is the process of interpreting a planet’s color palette to assess the possible mix of molecules in its atmosphere, land, and oceans.
Water makes up 71% of Earth’s surface, but no one knows how or when such massive quantities of water arrived on Earth.
A new study published in the journal Nature brings scientists one step closer to answering that question. Led by University of Maryland Assistant Professor of Geology Megan Newcombe, researchers analyzed melted meteorites that had been floating around in space since the solar system’s formation 4 1/2 billion years ago. They found that these meteorites had extremely low water content—in fact, they were among the driest extraterrestrial materials ever measured.
These results, which let researchers rule them out as the primary source of Earth’s water, could have important implications for the search for water—and life—on other planets. It also helps researchers understand the unlikely conditions that aligned to make Earth a habitable planet.
It’s easy to envisage other universes, governed by slightly different laws of physics, in which no intelligent life, nor indeed any kind of organized complex systems, could arise. Should we therefore be surprised that a universe exists in which we were able to emerge?
That’s a question physicists including me have tried to answer for decades. But it is proving difficult. Although we can confidently trace cosmic history back to one second after the Big Bang, what happened before is harder to gauge. Our accelerators simply can’t produce enough energy to replicate the extreme conditions that prevailed in the first nanosecond.
But we expect that it’s in that first tiny fraction of a second that the key features of our universe were imprinted.
Simulations show that collisions between moons and planets may be a regular danger for possible extraterrestrial life.
Imagine a universe with extremely strong gravity. Stars would be able to form from very little material. They would be smaller than in our universe and live for a much shorter amount of time. But could life evolve there? It took human life billions of years to evolve on Earth under the pleasantly warm rays from the Sun after all.
Now imagine a universe with extremely weak gravity. Its matter would struggle to clump together to form stars, planets and—ultimately—living beings. It seems we are pretty lucky to have gravity that is just right for life in our universe.
This isn’t just the case for gravity. The values of many forces and particles in the universe, represented by some 30 so-called fundamental constants, all seem to line up perfectly to enable the evolution of intelligent life. But there’s no theory explaining what values the constants should have—we just have to measure them and plug their numbers into our equations to accurately describe the cosmos.
