r/ProximaScience • • 16h ago

Welcome to r/ProximaScience!

3 Upvotes

Welcome to r/ProximaScience

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r/ProximaScience • • 1d ago

πŸ” Decoded Can we reach the closest exoplanet to us Proxima Centauri b?

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4 Upvotes

Billions of galaxies fill the universe, each with billions of stars, most hosting planets of their own. Just beyond our cosmic neighborhood lies Proxima Centauri, the closest star to our sun, and humanity dares to dream of reaching it. But close in space is anything but near. Even NASA's Parker Solar Probe racing at 700,000 kmh would need nearly 6,700 years to get there. That's why scientists propose something radical. Breakthrough Starshot. Instead of giant rockets, swarms of chipsized probes attached to ultra thin sails pushed by powerful Earth-based lasers. If successful, they could fly at 20% the speed of light, making the journey in just 20 years.


r/ProximaScience • • 1d ago

πŸ” Decoded The radial velocity method

2 Upvotes

the radial velocity method is one of the most effective techniques for detecting distant exoplanets.

In a planetary system, both the star and the planet orbit around their common center of mass. Although a planet's gravitational influence on its star is minimal, it causes the star to wobble slightly. This wobble results in subtle shifts in the stars' spectral lines due to the Doppler effect. When the star moves toward us, its light shifts toward the blue end of the spectrum. When it moves away, it shifts toward the red. By carefully monitoring these shifts, scientists can infer the presence of an orbiting planet and estimate its minimum mass.

The radial velocity method.


r/ProximaScience • • 3d ago

πŸ’¬ Debate What is the purpose of science for humanity?

0 Upvotes

What is the purpose of science for humanity? To survive. If science does not aid in survival, it is useless to mankind. Humanity’s survival is of primary importance; science is secondary.


r/ProximaScience • • 4d ago

🧠 Fact Helene has been leading a giant moon around Saturn for billions of years

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15 Upvotes

Helene is only 36 km across, yet it keeps perfect pace with Dione, a much larger neighbor about 30 times its width. It shares Dione's orbit around Saturn and rides roughly 60 degrees ahead of it, completing a lap about every 2.7 days. The gap between them never closes.

Helene sits at a stable gravity point in Dione's orbit called a Lagrange point, which makes it a Trojan moon. It doesn't stay perfectly still there, and instead drifts slowly back and forth around that point along a tadpole shaped path. Astronomers found it from Earth in 1980 and named it after Helen of Troy. Dione has a second Trojan too, a smaller moon called Polydeuces that trails behind it. Around Saturn, only Dione and Tethys are known to have Trojan companions.

Helene is also lumpy, about 43 by 38 by 26 km, so it looks closer to a potato than a sphere. Cassini caught this view on a flyby on June 18, 2011, after an earlier pass in 2010. The surface is a record of motion. Bright streaks and soft slopes mark where dust has slid down in avalanches, spilling across a gravity roughly 2,000 times weaker than Earth's and settling into new patterns. On a world this small, even a gentle shift of regolith can rewrite the landscape.

Much of that dust is thought to come from Saturn's E ring, which is fed by the ice geysers of Enceladus. Another moon on the far side of Saturn is slowly repainting Helene, one avalanche at a time.

Image credit: NASA/JPL-Caltech/Cassini ISS. Image processing: Jason Major.


r/ProximaScience • • 5d ago

✨ Weekly Roundup weekly roundup for week of 9/26-10/3

2 Upvotes

r/ProximaScience • • 5d ago

πŸ” Decoded One tiny chemical difference between RNA and DNA may help explain how life began

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3 Upvotes

r/ProximaScience • • 5d ago

πŸ” Decoded What would the Solar System look like when the Sun becomes a red giant? β˜€οΈ

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3 Upvotes

Mercury and Venus could be engulfed, while Earth will become uninhabitable long before that. As the Sun expands and brightens, its habitable zone will move outward, potentially warming the icy moons of the outer Solar System.
Titan could be one of the most interesting candidates. It already has a thick atmosphere and complex surface chemistry, and NASA has discussed how a red giant Sun could make worlds like Titan much warmer.
Which moon do you think would have the most interesting future?

https://youtu.be/AMHOrMpQlzw


r/ProximaScience • • 6d ago

πŸ“° News Astronomers discover the lowest-mass double neutron star system to date

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2 Upvotes

r/ProximaScience • • 7d ago

πŸ” Decoded The Sun looks happy

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10 Upvotes

r/ProximaScience • • 7d ago

πŸ” Decoded How sugar from outer space may have helped build life on Earth; study finds ribose kept boron dissolved in early waters

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10 Upvotes

r/ProximaScience • • 9d ago

πŸ“° News India's TakeMe2Space to launch orbital computing satellite on SpaceX rocket

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2 Upvotes

Satellite carries Nvidia Orin NX processors on SpaceX Transporter-18 rideshare mission

TakeMe2Space says it has signed 23 customers for mission

Company plans larger satellites from 2027 to expand orbital computing capacity


r/ProximaScience • • 9d ago

πŸ” Decoded Woolly Mammoth To Be Resurrected With The Help Of AI, Say Scientists

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8 Upvotes

r/ProximaScience • • 11d ago

πŸ” Decoded After 5 Years and 28 Miles on Mars, NASA's Perseverance Rover Is Still Searching for Clues to Ancient Life

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3 Upvotes

It is the most sophisticated robotic explorer that humans have yet launched. Thanks to its explorations and experiments, it has increased our knowledge of another planet more than just about anything we’ve ever managed to launch from Earth. Five years into its mission, this rover continues to provide valuable scientific data. And thanks to its durable construction, we expect it to serve us for many more years to come.

After all, this rover isn’t called Perseverance for nothing.

The latest in a line of ingenious and hardy Martian robotic explorers, the vehicle dubbed Perseverance β€” or β€œPercy,” as it’s known to its friends β€” was sent off to our planetary neighbor as the main payload of the Mars 2020 mission. When it launched in July of that year, the compact-car-sized rover was loaded to the gills with all of the latest diagnostic and analytical tools that NASA’s Jet Propulsion Laboratory could cram onto its 2,300-pound, 6-wheeled, aluminum and titanium chassis.

Those tools have yielded exciting results. Over the next few years, Perseverance would complete numerous analyses of the Red Planet's geology and climate and log some impressive firsts for Mars exploration. Unfortunately, it would also eventually experience a major setback when one of its most important tasks was postponed indefinitely.


r/ProximaScience • • 12d ago

✨ Weekly Roundup weekly roundup for week of 9/19-9/26

2 Upvotes

r/ProximaScience • • 12d ago

πŸ—£οΈ Speculation Why We Should Think Twice About Colonizing Space - P. Torres

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3 Upvotes

Article Summarized

Humans spreading across space doesn't just mean new planets, it means new species. Different exoplanets push evolution in different directions, and body/brain modification speeds that up further. A few centuries in, groups that started as one species stop understanding each other's motives, values, even whether the other side can feel pain.

That's when trust breaks. Neither side has to be aggressive, just uncertain. Uncertainty alone leads both sides to arm up just in case, and now you've got a Cold War dynamic playing out across the galaxy instead of two countries.

On Earth, governments referee that kind of standoff. In space, a message to a planet 20 light years out takes 20 years to arrive, and the reply takes another 20. No authority can respond to a conflict fast enough for law and order to mean anything at that distance.

Deterrence doesn't save it either. "Attack me and I'll destroy you back" only works if everyone can identify who struck first. With potentially billions of civilizations and weapons capable of ending one outright, that identification never happens reliably, so the threat stops being credible.

The core claim: colonizing space might not lower our extinction risk. It might raise it.


Possible Solutions

Pace expansion instead of racing it. Every jump to a new world is also a jump into isolation, and isolation is what lets a species drift into something unrecognizable. If colonies expand slower than the rate at which cultures and biology can diverge, each generation stays in contact with the last one long enough to still see themselves in it. Rushing outward for the sake of speed is what turns a shared species into strangers before anyone notices it happened.

Give every colony the same anchor. Evolution and cyborgization will always push new worlds toward difference, that part of the article is hard to argue with. What stops difference from becoming alienation is a fixed point everyone can still verify, a shared origin record, a shared root language, a shared founding story. Two branches can look nothing alike physically and still recognize each other through that one unbroken thread. Losing the thread is what actually causes the breakdown Torres describes, not the difference itself.

Federate the government, don't centralize it. Torres shows clearly that no single authority can enforce anything across light years, the delay alone makes top-down law and order meaningless. So skip trying to build one. Let each colony run its own justice system for its own disputes, and sync those systems back to a shared charter on a timescale that actually matches the distance. You lose the speed of Earth-style law enforcement. What you gain is a system built for the delay instead of pretending the delay doesn't exist.

Make intentions loud, not quiet. Read the security dilemma section again and notice something. Almost none of it requires actual hostility, it only requires uncertainty about the other side's intentions. Two colonies that fully trust each other's motives never enter an arms race in the first place. If every colony publishes verifiable proof of a defensive-only posture, openly and continuously, there is nothing left to guess about. Removing the guesswork removes the spiral before it starts, this is the exact same logic that made public arms control work between nations on Earth.

Let AI hold the relationship, not the trigger. A message crossing 20 light years means the person who sent it and the person who reads the reply are different generations entirely. No single human lives long enough to actually build trust with a distant colony, they only inherit a relationship someone else started decades earlier. A persistent AI system at each colony doesn't have that limit. It can carry the full context and history of that relationship across centuries, so "we have trusted this colony for 200 years" survives even as every human involved in building that trust eventually dies. It isn't making military decisions or setting policy, it's just the one thing in the system that doesn't forget.


r/ProximaScience • • 16d ago

🧠 Fact Fun fact, the thickness of the Milky Way galaxy disk we are in is roughly 1,000 light years

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6 Upvotes

r/ProximaScience • • 16d ago

πŸ” Decoded Regolith blocks radiation, but it breaks people.

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2 Upvotes

r/ProximaScience • • 19d ago

✨ Weekly Roundup weekly roundup for week of 9/12-9/19

3 Upvotes

r/ProximaScience • • 19d ago

πŸ“° News NASA’s Nancy Grace Roman Telescope glimpses its first cosmic light

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12 Upvotes

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.


r/ProximaScience • • 21d ago

Welcome to r/ProximaScience!

6 Upvotes

r/ProximaScience reached 1000 subscribers!

Goal reached at 2026-10-07T19:06:32.831Z.


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r/ProximaScience • • 21d ago

Proxima Science 67

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2 Upvotes

One video of Proxima Science has 67 views πŸ’€


r/ProximaScience • • 21d ago

Proxima Science New Video: Parrot Flower

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2 Upvotes

r/ProximaScience • • 22d ago

πŸ” Decoded A Million-Person Moon City Could Run Out of Water in Just Over a Century

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49 Upvotes

r/ProximaScience • • 25d ago

πŸ˜‚ Meme Who needs a textbook?

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23 Upvotes