Exoplanets

Jun. 25th, 2025 01:00 pm
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Mojave lichen defies death rays—could life thrive on distant exoplanets?

Lichen from the Mojave Desert can survive, and replicate, under levels of extreme solar radiation found on Earth-like planets in other solar systems.
Lichen from the Mojave Desert has stunned scientists by surviving months of lethal UVC radiation, suggesting life could exist on distant planets orbiting volatile stars. The secret? A microscopic “sunscreen” layer that protects their vital cells—even though Earth’s atmosphere already filters out such rays
.

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"Bone" is a gorgeous piece of near-future science fiction with a very classic flavor, about a startling discovery on Europa. 

Exoplanets

Apr. 26th, 2025 01:43 am
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Astronomers find Earth-like exoplanets common across the cosmos

New study debunks a single planet-formation scenario.
Astronomers have discovered that super-Earth exoplanets are more common across the universe than previously thought. While it can be relatively easy to locate worlds that orbit close to their star, planets with wider paths can be difficult to detect. Still, researchers estimated that for every three stars, there should be at least one super-Earth present with a Jupiter-like orbital period, suggesting these massive worlds are extremely prevalent across the universe
.
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People have expressed interest in deep topics, so this list focuses on philosophical questions.

Should we terraform planets if it means that we may be destroying undiscovered microscopic alien life?

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Sound frequencies of stars sing of our galaxy's past and future

Researchers interrogated the 'sounds' of a cluster of stars within the Milky Way, uncovering a new technique for astrophysicists to probe the universe and learn more about its evolution.
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Folks have mentioned an interest in questions and conversations that make them think. So I've decided to offer more of those. This batch features hobbies.

Stargazing is a hobby of watching the sky at night. This must be among the oldest of hobbies, as humans have been fascinated by the stars for many thousands of years at least. It is easier with modern telescopes though.

On Dreamwidth, see [community profile] common_nature for inspiration. [community profile] astronomy and [community profile] science are dormant, but posting is open to all members so these should be revivable.

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My partner Doug tipped me to these articles:


Surprisingly big organic molecules on Mars: A hint of life?

NASA’s Curiosity rover has now discovered the largest known organic molecules to date. They are three kinds of long-chained carbon molecules that scientists say are the remains of fatty acids. Fatty acids are common in life on Earth, but can also form without life.
The complex carbon molecules are in mudstone rocks that used to be at the bottom of an ancient lake. Scientists don’t yet know how they formed, but they are certainly tantalizing
.


See auroras on Neptune for the first time!

The Webb space telescope has finally caught auroras on Neptune. Neptune lies in the frigid, dark, vast frontier of the outer edges of our solar system about 3 billion miles away from the sun.

Exoplanets

Mar. 16th, 2025 03:07 pm
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Signs of alien life may be hiding in these gases

Advancing the search for weird life on weird planets.
Scientists identify a new way to detect life in outer space with currently existing telescopes. The method hinges on worlds that look nothing like Earth, and gases rarely considered in the search for extraterrestrials
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The lunar eclipse has reached totality here in central Illinois and we have a nice clear sky.  It's a very dark eclipse, blotting out the moon almost completely and making the sky quite dark.  Most I've seen have just had a red or pink tint but the moon remained fairly visible.  If your sky is cloudy, there are livestreams like this one.

Exoplanets

Feb. 18th, 2025 05:01 pm
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Science Newsfrom research organizations

'Out of science fiction': First 3D observations of an exoplanet's atmosphere reveal a unique climate
Astronomers have peered through the atmosphere of a planet beyond the Solar System, mapping its 3D structure for the first time. By combining all four telescope units of the European Southern Observatory's Very Large Telescope (ESO's VLT), they found powerful winds carrying chemical elements like iron and titanium, creating intricate weather patterns across the planet's atmosphere. The discovery opens the door for detailed studies of the chemical makeup and weather of other alien worlds.



This sounds like what one worldbuilding book called "rigorous chemical conditions." It's challenging to visit ... but the more complex and active an atmosphere is, the more I start thinking about how life likes environments where lots of things are happening. With metallic clouds, it'd be "life not as we know it" but this really makes me want a closer look.
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Wham! Hear a meteorite hit the ground for the 1st time

See and hear a meteorite impact on Prince Edward Island.


It sounds ... crunchy.

Icy Moons

Dec. 25th, 2024 08:38 pm
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Mysteries of icy ocean worlds

New research advances understanding of the habitability of icy moons. A study introduces a novel thermodynamic concept called the 'centotectic' and investigates the stability of liquids in extreme conditions -- critical information for determining the habitability of icy moons like Europa.


Well, that's useful. \o/
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Planets form through domino effect

New radio astronomy observations of a planetary system in the process of forming show that once the first planets form close to the central star, these planets can help shepherd the material to form new planets farther out. In this way each planet helps to form the next, like a line of falling dominos each triggering the next in turn.


This makes sense, and relates to spacing.
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First close-up image of a star outside the Milky Way

Bottom line: Astronomers have taken the first close-up image of a star in a galaxy outside of our own Milky Way. And this star – WOH G64 in the Large Magellanic Cloud – appears to be getting ready to go supernova.

This is pretty cool.
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When do new technological developments become 'realism' and not 'the future'? Writing about humans flying through the air in strange machines was once SF, but Snakes on a Plane isn't.

Discuss.
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This poem came out of the September 2024 [community profile] crowdfunding Creative Jam. It was inspired by a discussion with Jessica. It also fills the "Compensating for Each Other's Weaknesses" square in my 9-1-24 card for the People with Disabilities Bingo fest. This poem has been sponsored by Anthony Barrette. It begins the series Quadrilateral Equations.

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Hera looks back at Earth and the moon

ESA’s Hera mission launched toward the asteroid moon Dimorphos on October 7, 2024. Its goal is to investigate the aftermath of humanity’s first planetary defense test in 2022, when DART struck the little asteroid. As Hera sailed off on its mission, it looked back at Earth and caught the above view of our home planet and the moon.


So small, so fragile, so beautiful. So infinitely precious.

There is no Planet B.

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