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When we launched this community, we did not yet have the ability to set different reputation grants for different categories. We've had this for a while but we failed to follow up before now, sorr...
Neopanamax beam is just under 52m, with a height of just under 60m. Let's give it about 50% margins on each side, and that give you 100m between bridge supports. A suspension bridge with a 100m spa...
I think it's unlikely. Colloquially a year is 365 days. But if you actually watch Earth complete an orbit in space, it will not be at the same rotation around its axis at the end as when it starte...
Look around the world to see what is possible with our current technology. The Golden Gate bridge has a deck 90 feet wide (27 meters) supporting 6 lanes, and its main span is 4200 feet (1.28 km) l...
Hello everyone, I am thinking yet again about infrastructure. (my calendar project recently asked about... well, that's outside my expertise, I'll get back to that eventually) And I am thinking of...
Something you may not have thought of: the Earth-Luna system has the barycenter inside the Earth's radius. Fairly deep inside, in fact -- about 25% of the way down from the surface. Your system as...
Precise alignment for a limited time Alignment of one ratio In your world, how long do you require the alignment to last? As Olin Lathrops's answer explains, stable resonances are very unlikely ...
First, the fussiness of the people has absolutely no bearing on how their solar system ended up. It is what it is, whether they like it or not. As for the physics, you are basically asking for ro...
I know that this is a bit silly, but I want to make a calendar for my world and I'm really worried about having to do leap years and such to ensure continuing accuracy. Inaccuracy isn't an option;...
The Earth-Moon Lagrange points have names: L1, L2, and L3 are Libration Points, the L4 and L5 points are the Kordylewski Clouds. The Jupiter-Sun L4 is named the Greeks, and the Jupiter-Sun L5 is n...
I recently learned that it's believed that the solar system once had one more gas giant, which was ejected by Jupiter some time in the past. https://thesolarsystem.fandom.com/wiki/Fifth_Giant Doe...
Yes. All plants require free oxygen, and any (part of a) plant that is not actively photosynthesising has to obtain its oxygen from its environment. We owe our oxygen supply to the fact that, on a...
Living in space can be boring. What are some good home games for people living and working in free fall? I thought of a few - Bocce : in this variant the size of the jack and the player balls i...
Kepler's Laws give us the velocity of everything in the debris field and comet cloud-- At any radius, $i$, the velocity of the circular orbits (and a good rough definition of a "belt", although th...
I was investigating a few ideas on recreational solar sailing, and came up with some interesting things - The primary equation in solar sailing is $ F = {{2 R S A} \over {c}} \sin^2{\theta} $ Whe...
Low gravity golf was invented by Alan Shepard in 1971 when he hit two golf balls 40 yards on the moon. Surprisingly, this version of the sport with little atmosphere and much lower gravity, is the...
I'm speaking as a regular user here despite that "staff" label next to my name. Scope is decided by communities, not imposed from above. I think science-based questions about sports, like golf in...
According to this site, the kinetic energy of the two alpha particles emitted is 4.273 MeV. As you said, these aren't neutral atoms yet with balancing electrons. So, they are a charged plasma. Im...
I feel like science fiction doesn't have many sports, other than the occasional laser battle or fantasy sword duel. I'd like to start a discussion series about sports in a low-gravity/no-gravity e...
I'd recommend a Kalman filter to increase measurement accuracy to the overlap of multiple system errors so that you get the best result. For inputs, may I recommend - a calculation of doppler s...
This appears to be a data error related to imported questions. The question was imported with four answers on 2020-05-04. On 2021-03-02, a script deleted zero-score answers from accounts that wer...
Since voting on this discussion is currently unclear, I'm separating out each proposal from the question for voting, each in its own answer: Proposal 3 Posts that were imported, claimed, not ed...
Since voting on this discussion is currently unclear, I'm separating out each proposal from the question for voting, each in its own answer: Proposal 2 Posts that were imported, claimed, and no...
Since voting on this discussion is currently unclear, I'm separating out each proposal from the question for voting, each in its own answer: Proposal 1 Posts that were imported, not claimed, an...
I've noticed that some questions have a mismatch between the number of answers showing in the question list page, and the number of answers showing on the specific question page. For example, the R...
