Planets may fare better in open areas, like the suburbs, instead of densely populated “urban” areas, said Jessie Christiansen, an exoplanet scientist at Caltech.
Some neighborhoods in the Milky Way may be better suited for making habitable planets than others.
In 1,827, botanist Robert Brown studied pollen particles’ motion as they were suspended in water. These little grains seemed to jitter around randomly. Brown performed as variety of tests on them and realized that all small particles, not just pollen, exhibited the same motion when suspended in water. Something other than the presence of life was causing these little particles to move around. Mathematicians took note and quickly developed a theory describing this process and named it Brownian Motion in his honor.
This theory has expanded well beyond its original context and become a beautiful subfield of mathematics called Stochastic Processes. Nowhere was this influence illustrated better than in 1905 when Albert Einstein used the theory of Brownian Motion to verify the existence of atoms. The makeup of our universe’s tiniest particles was highly debated at the time, and Einstein’s work helped solidify atomic theory.
Wow, that’s quite the leap! In order to understand how we got from pollen grains to confirming atomic theory, we’re going to have to learn some background about Brownian Motion. In this article, I’ll spend some time talking about the basics. This includes some cool videos that demonstrate the patterns of Brownian Motion and the statistics going on behind the scenes. We’ll then dive into Einstein’s version which came as one of his extremely influential series of papers in 1905. There’s a lot of ground to cover, so let’s get started!
New findings from the James Webb Space Telescope reveal a surprising abundance of oxygen in the early Universe. Researchers discovered that oxygen levels in galaxies surged within 500–700 million years following the Universe’s birth, reaching levels comparable to those in contemporary galaxies. This suggests that the essential elements for life were present much earlier than previously believed.
In the early Universe, shortly after the Big Bang, only light elements such as hydrogen, helium, and lithium existed. Heavier elements like oxygen were subsequently formed through nuclear fusion reactions within stars and dispersed into galaxies, primarily through events like supernova explosions. This ongoing process of element synthesis, unfolding over the vast expanse of cosmic history, created the diverse elements that constitute the world and living organisms around us.
In a recent study, a team of researchers at Max Planck Institute for Physics proposed that advanced extraterrestrial civilizations may be using black holes as quantum computers. No matter how advanced a civilization may be, we are all bound by the laws of quantum physics and gravity. So, if aliens are indeed out there, they could be using the geometry of spacetime around a black hole which behaves like a quantum computer. And, as if that weren’t enough, quantum computing is also immune to decryption, making it the perfect tool for secure communication. Roger Penrose, famously proposed that it is possible to extract limitless energy from a black hole by tapping into its Ergosphere. This is a region just outside the event horizon, where matter falling into the black hole forms a disk that spins at nearly the speed of light and emits massive amounts of radiation. Several researchers now suggest that this may be the ultimate power source for advanced civilizations. Subscribe to Science Time: https://www.youtube.com/sciencetime24 #science #shorts #space
You have probably heard of the Fermi Paradox, but if you haven’t, here it is in a nutshell: Given the high probability that alien life exists out there in the universe (bearing in mind the vastness of space and that we keep finding planets within habitable zones) why has nobody got in touch yet? If there are so many other civilizations out there, possibly at far more advanced stages than we are because of how long the universe has dragged on, surely at least one would send out messages or probes, or do what we are doing: Desperately searching for signs of life?
Answers to the paradox range from the optimistic to the downright frightening. It could be that we simply haven’t been looking long enough, nor emitting our own traceable signatures for aliens to find us yet. Or it could be that no aliens will ever make it to the point where they are able to make contact with other species, destroying themselves long before they get to the kind of tech required to do so.
In the quest to understand the potential for life beyond Earth, researchers are widening their search to encompass not only biological markers, but also technological ones. While astrobiologists have long recognized the importance of oxygen for life as we know it, oxygen could also be a key to unlocking advanced technology on a planetary scale.
In a new perspective published in Nature Astronomy, Adam Frank, the Helen F. and Fred H. Gowen Professor of Physics and Astronomy at the University of Rochester and the author of The Little Book of Aliens (Harper, 2023), and Amedeo Balbi, an associate professor of astronomy and astrophysics at the University of Roma Tor Vergata, Italy, outline the links between atmospheric oxygen and the potential rise of advanced technology on distant planets.
“We are ready to find signatures of life on alien worlds,” Frank says. “But how do the conditions on a planet tell us about the possibilities for intelligent, technology-producing life?”
The TOI-700 star system is home to four planets, including two in its habitable zone that could host liquid water.
NASA’s Goddard Space Flight Center.
NASA recently announced the discovery of a new, Earth-sized planet in the habitable zone of a nearby star called TOI-700. We are two of the astronomers who led the discovery of this planet, called TOI-700 e is just over 100 light-years from Earth — too far away for humans to visit — but we do know that it is similar in size to Earth, likely rocky in composition and could potentially support life.
January 8, 2024, Mountain View, CA — In a groundbreaking cosmic quest, the SETI Institute’s Commensal Open-Source Multimode Interferometer Cluster (COSMIC) at the Karl G. Jansky Very Large Array (VLA) is expanding the search for extraterrestrial intelligence (SETI). This cutting-edge technology is not a distinct telescope; it’s a detector. COSMIC searches for extraterrestrial signals and paves the way for future science using a copy of the raw data from the telescope’s observations. At the heart of COSMIC’s mission is pursuing the age-old question: Are we alone in the universe? Project scientist Dr. Chenoa Tremblay and the team detailed the project in a paper published in The Astronomical Journal.
What sets COSMIC apart is its adaptability to the future. The system is designed for future upgrades, ensuring it remains at the forefront of cosmic exploration. With the potential to expand its capabilities, COSMIC could soon cover more stars, explore new frequencies, and enhance our understanding of the vast cosmic tapestry. It is important to note that COSMIC’s capabilities go beyond searching for extraterrestrial intelligence. Future upgrades could unlock new explorations, from finding fast radio bursts with a submillisecond temporal resolution to studying spectral line science and axionic dark matter.
“COSMIC introduces modern Ethernet-based digital architecture on the VLA, allowing for a test bed for future technologies as we move into the next generation era,” said Tremblay. “Currently, the focus is on creating one of the largest surveys for technological signals, with over 500,000 sources observed in the first six months. However, the flexibility of the design allows for a wide range of other scientific opportunities, such as studying fast radio burst pulse structures and searching for axion dark matter candidates. We hope to open opportunities for other scientists to use our high time (nanoseconds) or our high spectral resolution (sub-Hz) to complete their research. It is an exciting time for increasing the capabilities of this historic telescope.”
https://trib.al/2HpyN4k The new SETI experiment is being conducted on the Very Large Array of radio telescopes.
