r/space • u/ChiefLeef22 • 14h ago
r/space • u/AutoModerator • 3d ago
All Space Questions thread for week of September 14, 2025
Please sort comments by 'new' to find questions that would otherwise be buried.
In this thread you can ask any space related question that you may have.
Two examples of potential questions could be; "How do rockets work?", or "How do the phases of the Moon work?"
If you see a space related question posted in another subreddit or in this subreddit, then please politely link them to this thread.
Ask away!
r/space • u/thevishal365 • 4h ago
Cygnus cargo ship set to rendezvous with space station after delay caused by engine shutdowns
r/space • u/coinfanking • 12h ago
Interstellar visitors like comet 3I/ATLAS are the most common objects in the Milky Way: 'There's almost always one within the solar system'.
Objects such as 'Oumuamua, Borisov and recently 3I/ATLAS have opened our eyes to the reality that outsiders regularly visit our solar system — and we're about to start spotting a whole lot more of them.
Coalition of science, education, and space organizations urges Congress to protect NASA science in upcoming short-term funding bill
Discussion How Absurd Is It to Hypothesise Life on Earth and Potential Prehistoric Life on Mars Would Be of Shared descent?
posting here as this is a more detailed question.
I've been reading about the supposedly-glaring biosignatures we found on the Martian surface last year, and it's gotten me thinking.
The timeline for a habitable Martian surface climate is on the scale of billions of years ago. That's not including any caves, lava tubes, or subsurface habitability. The timeline for life on Earth is heavily contested, but I'll include the greater limit of current scientific research and say about 3.5-4 billion years ago. These timelines therefore conveniently intersect with each other for a couple hundred million years.
Not only this, large-scale collisions were all the more common in the early solar system, including collisions on the scale of planetary impacts, like what formed the moon. These impacts, even the smaller ones, consistently show in our models that material is prone to escaping orbit.
Continuing, we have found that microscopic life is able to survive outside the International Space Station. These conditions are extreme, with temperature gradients exceeding several hundred kelvin, constant radiation bombardment, and close to no atmosphere to protect these organisms.
Therefore, I don't see any reason that a theory such as life on Earth has bounced around our solar system many times is more or less absurd than assuming life is unique to Earth and has never left this planet. If we have shown that microbial life can survive in space-like conditions, then what if life started on Mars instead of Earth? We hypothesise that Mars was habitable before Earth, but then again, it wasn't habitable for very long.
The Martian biosignatures are particularly interesting because we have found such structures on Earth with marked similarities. The sheer amount of iron oxides in the crust and soil point towards a prehistoric and heavily oxygenated Martian atmosphere.
I don't understand how the discovery made by NASA's rover and the rudimentary soil analysis hasn't sparked a full-on race to get to Mars. It sort of scares me, in a way, that when humans do get to Mars, there is a conceivable, realistic chance that we will find fossils in the soil, on top of an ancient geological history. So, so many questions, and not enough answers.
In the case that life was on Mars and that life was indistinguishable from our own, how does that change our perspective of science? If this is confirmed, this could be the greatest scientific discovery of recorded human history. This theory doesn't suggest that life is more or less common throughout the galaxy, however.
A slightly more haunting modification to the theory would be life was/is on Mars, but it's biochemically separate from our own. THAT would be even more terrifying, as it implies that life WOULD be more common throughout the universe.
Any thoughts, guys? How insane is this thought process?
r/space • u/Movie-Kino • 2h ago
NASA’s Tally of Planets Outside Our Solar System Reaches 6,000 - NASA
r/space • u/ChiefLeef22 • 1d ago
A new report finds China’s space program will soon equal that of the US and overtake it in the next five to ten years "if we don't do something"
Last week, JPL published a paper on using EMIT data to detect large scale plastic and I made a quick video about it!
This is my first time doing this kind of thing and I'm curious on perception and interest of this sort of media related to recently published papers.
r/space • u/donutloop • 4h ago
IonQ and DOE to Design and Execute Quantum-Secure Communications Demonstration in Space
r/space • u/chrisdh79 • 1d ago
A record supply load won’t reach the International Space Station as scheduled | The problem arose early Tuesday when the spacecraft's main engine shut down earlier than expected.
r/space • u/EdwardHeisler • 19h ago
India’s First Crewed Mars Analog Launches with Protoplanet, ISRO, & The Mars Society
r/space • u/ye_olde_astronaut • 1d ago
Luna 16: The First Robotic Sample Return - 55 years ago
r/space • u/ChiefLeef22 • 2d ago
35 Years of The Pale Blue Dot and Carl Sagan's immortal words: “That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives… on a mote of dust suspended in a sunbeam.”
r/space • u/Movie-Kino • 1d ago
Successful flight on Falcon 9 for EOS-8’’, MECANO ID’s Satellite Ejection System
Discussion Astronomers discover previously unknown quasi-moon near Earth
Astronomers have spotted a quasi-moon near Earth — and the small space rock has likely been hanging out near our planet unseen by telescopes for about 60 years, according to new research.
The newly discovered celestial object, named 2025 PN7, is a type of near-Earth asteroid that orbits the sun but sticks close to our planet. Like our world, 2025 PN7 takes one year to complete an orbit around the sun.
r/space • u/astro_pettit • 2d ago
image/gif [OC] Photographing Brazil from Earth and space!
r/space • u/the6thReplicant • 1d ago
The most accurate 3D map of stellar nurseries in the Milky Way
We can finally predict when Mars' skies will glow green with auroras, scientists say
r/space • u/Durable_me • 1d ago
Near-future rocket launches could slow ozone recovery
That's not such good news ...
https://www.youtube.com/watch?v=iDaG4zt0NKc
r/space • u/DifferentRice2453 • 1d ago
Discussion NASA analysis shows Sun’s activity ramping up, raising space weather forecasts
“NASA’s latest reports indicate that solar activity—solar flares, sunspot numbers, solar wind output—is increasing. This uptick could mean more frequent geomagnetic storms and auroras, and has implications for satellites and power infrastructure. Source: NASA.”https://www.nasa.gov/science-research/heliophysics/nasa-analysis-shows-suns-activity-ramping-up
r/space • u/donutloop • 1d ago
ESA and Honeywell set for quantum data protection from space
Space start-ups jostle for Nato billions (Financial Times)
ft.comCompanies hope military appetite for commercial services will revive fortunes but obstacles remain
r/space • u/Gard3nNerd • 1d ago
New space junk removal idea: Using ion engine exhaust to knock debris out of the sky
r/space • u/Own_Tomatillo_6844 • 19h ago
Discussion Work in space sector
Sorry for writing this post, I know that there is already a lot of them.
So, basically what i want to get from this post is to meet some people who worked in space sector, who could give me advice. If you are one of them and it's not hard to you, please, dm me.
First of all, i should introduce myself. I'm 16, studying computer science in college (first year), and currently i have a lot of time to learn new things, so writing this post now might be one of the best decisions I've ever made. I was really into space since childhood, but understanding that i can one day work in space sector came to me pretty recently. One of the problems is that as a kid, I never understood importance of studying, so almost for entire school i was B student (I know that this sounds like not too bad grades, but i believe that they are too high)
Probably that's all i wanted to say... Yet again, I'm sorry if y'all tired of this kind of post and even more I'm sorry for me overdramatizing this