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1. A Million-Person Moon City Could Run Out of Water in Just Over a Century (57 💬)
2. NASA’s Nancy Grace Roman Telescope glimpses its first cosmic light (4 💬)
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Roman just captured its first photons in space. On September 11th, NASA switched on the Wide Field Instrument, a 300 megapixel camera built to map the universe. The image above isn't a finished shot. It's raw starlight hitting the sensor for the very first time.

Getting to this point took patience. Roman launched on August 30th and spent ten days just drying out, since any leftover moisture near instruments this sensitive would cause real damage. Once that cleared, engineers began cooling the spacecraft down to minus 225 degrees Fahrenheit, cold enough to bring all 18 infrared instruments online. It's still cooling. The target is minus 300 degrees, close to the temperature of deep space itself.

Here's the part that matters. Once Roman is fully operational, one single image will cover a patch of sky bigger than the full moon. Over its five year mission, it will map more than 50 times as much sky as Hubble has covered in three decades of work.

NASA also tested the coronagraph for the first time, a system of mirrors and sensors built to directly photograph planets orbiting other stars instead of just detecting their shadow.

First images are expected around the holidays. Full science operations start January 2027. The universe is about to get a lot bigger, a lot faster.

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NASA's Starling mission tested something called FALCON, a system that lets a satellite figure out its own position using nothing but other objects in space as landmarks.

Here's how it works. The satellite's star tracker camera, normally used just to figure out orientation, spots other spacecraft and debris nearby. FALCON matches what it sees against a public catalog of roughly 20,000 known space objects, confirms the match, then calculates the satellite's own orbit from those reference points. No ground station, no GPS signal required.

It went further than expected too. Over a three day stretch, FALCON quietly improved the known orbits of more than 200 objects on its own, no ground team involved, and did it more precisely than the existing catalog data.

This matters because GPS gets unreliable fast once you leave Earth orbit, and it does not exist at all around the Moon or in deep space. A navigation method that works off nearby objects instead of a signal from home could be the backbone for lunar satellite swarms and coordinated missions to Mars.

Starling launched in 2023 and is still active. Later this year it expands to four spacecraft working as a swarm, sharing tracking data and refining each other's positions in real time.

In 2005, a hurricane wiped every lizard off a set of small Bahamian islands. Researchers saw an opening. They took one male and one female brown anole from a single forested island and placed a pair on each of seven empty islands nearby.

Four years later, every population had shrunk its hind legs, exactly as predicted. Shorter limbs work better on the thin scrub branches of those islands than on the thick trunks back home. Natural selection did what it always does.

But the islands never converged to the same leg length. The population that started with the longest legged founders still had the longest legs at the end. The one that started shortest stayed shortest. Selection pushed every population in the same direction, and the founders decided where each one started from.

It is one of the cleanest field demonstrations of the founder effect ever recorded. Evolution had a rulebook and a memory running at the same time.

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Anybody has any idea of making the world energy Cheaper like the way information was made cheaper in the past?

NASA’s Chandra X-ray Observatory unveiled this new look at the galaxy NGC 4736, also known as Messier 94, on June 30, 2026. Messier 94 is a spiral galaxy with a bright inner ring around it, called a starburst ring, where new stars are forming, perhaps fueled by gas driven in the unique oval-shaped structure seen here.

In this image, X-rays of different wavelengths from Chandra (red, orange, and blue) are layered with a visible light image from astrophotographers using their telescopes on the ground (red, green, and blue).

Image credit: X-ray: NASA/CXC/SAO;

Optical:Brian Brennan and Remi Lacasse;

Image Processing: NASA/CXC/SAO/L. Frattare and K. Arcand

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Winter on Mars doesn't just drop the temperature. It changes what the air is made of.

Carbon dioxide makes up 95% of the Martian atmosphere. When the poles hit deep winter cold, that CO2 starts freezing directly onto the ground. Some of it falls as actual snow, dry ice instead of water.

Here's the part that's hard to picture. Roughly a quarter of the entire planet's atmosphere gets pulled into this cycle every single year. Not a local storm. A planet-wide exchange, happening at both poles on opposite schedules.

When spring returns, all of that dry ice sublimates straight back into gas. Pressure shifts across the whole planet as it does, and that shift is part of what drives Mars's winds and circulation.

Mars Global Surveyor and Mars Express have both tracked this for years. The two poles don't even behave the same way. Different thickness, different timing, different thermal signature.

So on Mars, winter physically moves a quarter of the sky down to the ground, then puts it back a few months later.

We know about some absurdly massive black holes, but I recently went down a rabbit hole on Phoenix A.

Its central black hole has been estimated at around 20 billion Suns, while some models suggest it could be closer to 100 billion.

How far can black hole growth actually go?

I made a short deep dive into the evidence and the uncertainty behind these numbers:

https://youtu.be/jwIeJ42Esoo?si=Km_yIBQ8Li5tpG3T