Enceladus’ status as a target in the search for life keeps rising. We’ve known for years that plumes erupting from the ocean under the moon’s icy shell contain important organic compounds related to life. Now, researchers have found another chemical in the plumes which is not only highly toxic but also critical in the appearance of life.
Continue reading “Toxic Gas is Leaking out of Enceladus. It’s also a Building Block of Life.”Webb Finds Icy Complex Organic Molecules Around Protostars: Ethanol, Methane, Formaldehyde, Formic Acid and Much More
In the quest to understand how and where life might arise in the galaxy, astronomers search for its building blocks. Complex Organic Molecules (COMs) are some of those blocks, and they include things like formaldehyde and acetic acid, among many others. The JWST has found some of these COMs around young protostars. What does this tell astronomers?
Continue reading “Webb Finds Icy Complex Organic Molecules Around Protostars: Ethanol, Methane, Formaldehyde, Formic Acid and Much More”Could Life Exist in Molecular Clouds?
Our search for life beyond Earth is still in its infancy. We’re focused on Mars and, to a lesser extent, ocean moons like Jupiter’s Europa and Saturn’s Enceladus. Should we extend our search to cover more unlikely places like molecular clouds?
Continue reading “Could Life Exist in Molecular Clouds?”Adolescent Galaxies are Incandescent and Contain Unexpected Elements
If the Universe has adolescent galaxies, they’re the ones that formed about 2 to 3 billion years after the Big Bang. New research based on the James Webb Space Telescope shows that these teenage galaxies are unusually hot. Not only that, but they contain some unexpected chemical elements. The most surprising element found in these galaxies is nickel.
Continue reading “Adolescent Galaxies are Incandescent and Contain Unexpected Elements”Wow. JWST Just Found Methane in an Exoplanet Atmosphere
If there’s one chemical that causes excitement in the search for biosignatures on other worlds, it’s methane. It’s not a slam dunk because it has both biotic and abiotic sources. But finding it in an exoplanet’s atmosphere means that planet deserves a closer look.
Continue reading “Wow. JWST Just Found Methane in an Exoplanet Atmosphere”A Galaxy Only 350 Million Years Old Had Surprising Amounts of Metal
Astrophysicists working with the JWST have found a surprising amount of metal in a galaxy only 350 million years after the Big Bang. How does that fit in with our understanding of the Universe?
Continue reading “A Galaxy Only 350 Million Years Old Had Surprising Amounts of Metal”A Robotic Chemist Could Whip up the Perfect Batch of Oxygen on Mars
Humans on Mars will need oxygen, and Mars’ atmosphere is pretty anemic when it comes to the life-sustaining element. NASA’s Perseverance rover successfully extracted oxygen from CO2 in Mars’ atmosphere, but there are other ways to acquire it. There seem to be vast amounts of water buried under the Martian surface, and oxygen in the water is just waiting to be set free from its bonds with hydrogen.
On Earth, that’s no problem. Just run an electrical current through water, and you get oxygen. But Mars won’t give up its oxygen so easily.
Continue reading “A Robotic Chemist Could Whip up the Perfect Batch of Oxygen on Mars”Life Might Be Easiest to Find on Planets that Match an Earlier Earth
We’re inching closer and closer to reliably detecting biosignatures on distant planets. Much of the focus is on determining which chemicals indicate life’s presence.
But life can also create free energy in a system, and excess energy can create chemical disequilibrium. That’s what happened on Earth when life got going. Could chemical disequilibrium be a biosignature?
Continue reading “Life Might Be Easiest to Find on Planets that Match an Earlier Earth”Enceladus has All the Raw Materials for Life
Saturn’s ocean moon, Enceladus, is attracting increasing attention in the search for life in our Solar System. Most of what we know about Enceladus and its ice-covered ocean comes from the Cassini mission. Cassini ended its exploration of the Saturn system in 2017, but scientists are still working through its data.
New research based on Cassini data strengthens the idea that Enceladus has the chemicals necessary for life.
Continue reading “Enceladus has All the Raw Materials for Life”Spaceflight is Polluting the Atmosphere with Metal
Humans can’t seem to interact with the environment at all without fouling it in some way. From plastic bags in the ocean’s deepest regions to soot on Himalayan glaciers, our waste is finding its way into Earth’s most difficult-to-reach places.
Now, we can add metals in the stratosphere to this ignominious list.
Continue reading “Spaceflight is Polluting the Atmosphere with Metal”