Should companions orbiting a brown dwarf be considered a moon or a planet?
They possibly detected a planetary-mass companion orbiting a brown dwarf. Here's the abstract of the paper in Nature. It's a 0.9 Jupiter mass companion orbiting a brown dwarf with 29 Jupiter masses. There's no scientific consensus if this should be considered a planet or moon. I'm curious what you guys lean towards.
https://redd.it/1vj4nwd
@r_space
They possibly detected a planetary-mass companion orbiting a brown dwarf. Here's the abstract of the paper in Nature. It's a 0.9 Jupiter mass companion orbiting a brown dwarf with 29 Jupiter masses. There's no scientific consensus if this should be considered a planet or moon. I'm curious what you guys lean towards.
https://redd.it/1vj4nwd
@r_space
Nature
Planetary-mass exosatellite detected around the substellar companion of a star
Nature - Radial velocity measurements provide evidence for a Jupiter-mass exosatellite orbiting the brown dwarf companion CD-35 2722 B, a promising detection of an exomoon-like object.
Curated MIT 16.00x (Astronautics & Human Spaceflight) Lecture Playlist for Anyone Learning Aerospace
Hey everyone,
I’m fairly new to aerospace engineering and currently working my way through foundational concepts. While diving into open resources, I came across MIT’s 16.00x: Introduction to Aerospace Engineering (Astronautics and Human Spaceflight), taught by former NASA astronaut Dr. Jeffrey Hoffman.
The full course structure is available on MIT OpenCourseWare, but navigating through the website modules just to watch the video lectures sequentially felt a bit clunky.
To make it easier for continuous watching, I organized all the core video lectures into a single sequential YouTube playlist.
I wanted to share this here in case anyone else is starting out, looking for a refresher, or wants an accessible stream of the lectures without clicking through nested course pages.
Here is the playlist link: `https://youtube.com/playlist?list=PLQ5yLmZZOIoI&si=dOGwMTgWExVTH1Q6`
The course covers:
Rocket science fundamentals (thrust, specific impulse, multi-stage rockets)
Orbital mechanics & delta-v budgets
Life support systems (ECLSS) and microgravity physiology
Spacesuit design and EVA mechanics
Hope this is helpful to someone else on a similar learning path!
https://redd.it/1vj7a0t
@r_space
Hey everyone,
I’m fairly new to aerospace engineering and currently working my way through foundational concepts. While diving into open resources, I came across MIT’s 16.00x: Introduction to Aerospace Engineering (Astronautics and Human Spaceflight), taught by former NASA astronaut Dr. Jeffrey Hoffman.
The full course structure is available on MIT OpenCourseWare, but navigating through the website modules just to watch the video lectures sequentially felt a bit clunky.
To make it easier for continuous watching, I organized all the core video lectures into a single sequential YouTube playlist.
I wanted to share this here in case anyone else is starting out, looking for a refresher, or wants an accessible stream of the lectures without clicking through nested course pages.
Here is the playlist link: `https://youtube.com/playlist?list=PLQ5yLmZZOIoI&si=dOGwMTgWExVTH1Q6`
The course covers:
Rocket science fundamentals (thrust, specific impulse, multi-stage rockets)
Orbital mechanics & delta-v budgets
Life support systems (ECLSS) and microgravity physiology
Spacesuit design and EVA mechanics
Hope this is helpful to someone else on a similar learning path!
https://redd.it/1vj7a0t
@r_space
Intel's proposed orbital data centers would manage thousands of simple LEO satellites — two-tier network puts the brains of satellite constellations in higher orbit
https://www.tomshardware.com/tech-industry/space/intels-proposed-orbital-data-centers-would-manage-thousands-of-simple-leo-satellites-two-tier-network-puts-the-brains-of-satellite-constellations-in-higher-orbit
https://redd.it/1vj8ngh
@r_space
https://www.tomshardware.com/tech-industry/space/intels-proposed-orbital-data-centers-would-manage-thousands-of-simple-leo-satellites-two-tier-network-puts-the-brains-of-satellite-constellations-in-higher-orbit
https://redd.it/1vj8ngh
@r_space
Tom's Hardware
Intel's proposed orbital data centers would manage thousands of simple LEO satellites — two-tier network puts the brains of satellite…
The proposed architecture is a different proposition from the orbital AI data centers
Dust Storm in the South Polar Region. Imaged by ESA Mars Express, processing by Andrea Luck
https://redd.it/1vjng8t
@r_space
https://redd.it/1vjng8t
@r_space
I captured Milky way Galaxy from my phone Camera in a remote location.
https://redd.it/1vjpo12
@r_space
https://redd.it/1vjpo12
@r_space
First photo of Earth from outer space; taken by strapping a camera to a US captured German V-2 Rocket and hoping the film would survive the crash, October 24th 1946
https://redd.it/1vjsi41
@r_space
https://redd.it/1vjsi41
@r_space
IRIS² reinforced and accelerated as implementation advances
https://www.esa.int/Applications/Connectivity_and_Secure_Communications/IRIS2_reinforced_and_accelerated_as_implementation_advances
https://redd.it/1vjqj57
@r_space
https://www.esa.int/Applications/Connectivity_and_Secure_Communications/IRIS2_reinforced_and_accelerated_as_implementation_advances
https://redd.it/1vjqj57
@r_space
ESA
IRIS² reinforced and accelerated as implementation advances
On 7 August, the European Commission and the SpaceRISE consortium concluded negotiations and signed an implementation agreement to roll out IRIS², the European Union’s new flagship satellite constellation. The agreement, among other things, adds 66 satellites…
All Space Questions thread for week of August 09, 2026
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!
https://redd.it/1vjwlnn
@r_space
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!
https://redd.it/1vjwlnn
@r_space
Reddit
From the space community on Reddit
Explore this post and more from the space community
Looking Back: NASA's Manned Moon Missions Scrubbed
https://www.nationalgeographic.com/science/article/100201-obama-nasa-budget-moon-constellation
https://redd.it/1vjtjoy
@r_space
https://www.nationalgeographic.com/science/article/100201-obama-nasa-budget-moon-constellation
https://redd.it/1vjtjoy
@r_space
Science
Obama Scrubs NASA's Manned Moon Missions
Although NASA will get a budget increase for 2011, plans to return humans to the moon by 2020 would be officially scrapped, because the program is "over budget, behind schedule, and lacking in innovation," according to the White House.
Lunar Orbiter 1: America’s First Lunar Satellite - 60 years ago
https://www.drewexmachina.com/2016/08/14/lunar-orbiter-1-americas-first-lunar-satellite/
https://redd.it/1vkckvx
@r_space
https://www.drewexmachina.com/2016/08/14/lunar-orbiter-1-americas-first-lunar-satellite/
https://redd.it/1vkckvx
@r_space
Drew Ex Machina
Lunar Orbiter 1: America’s First Lunar Satellite
With the historic landing of Apollo 11 on the Moon, the summer of 1969 was quite memorable for me as a budding seven-year-old space enthusiast. And among my arsenal of reference material for that e…
Space Agencies Are Trying to Keep Astronauts From Losing Their Sight
https://www.wired.com/story/space-agencies-trying-stop-astronauts-losing-sight/
https://redd.it/1vkghis
@r_space
https://www.wired.com/story/space-agencies-trying-stop-astronauts-losing-sight/
https://redd.it/1vkghis
@r_space
WIRED
Space Agencies Are Trying to Keep Astronauts From Losing Their Sight
A device currently being used to help octogenarians do self-administered eye exams could be part of future space missions to monitor astronauts’ ocular health.
Perseid meteor shower set to dazzle northern hemisphere this week
https://www.theguardian.com/science/2026/aug/09/perseid-meteor-shower
https://redd.it/1vkhfzt
@r_space
https://www.theguardian.com/science/2026/aug/09/perseid-meteor-shower
https://redd.it/1vkhfzt
@r_space
the Guardian
Perseid meteor shower set to dazzle northern hemisphere this week
Astronomers say viewing conditions promising for this year’s shower, and 50 to 100 meteors an hour may be visible