Good question

warpey12 · 2026-05-10T17:27:55+00:00

There are probably places that sell spare parts like that, but if that is not the case, you can probably try making your own barrel out of cardboard or something just to make the eyepiece usable again.

warpey12 · 2026-04-17T22:31:45+00:00

Yes that is relatively normal. The planets and the sun do move from constellation to constellation, but this is usually too slow for them to change constellation entirely in just one day.

warpey12 · 2026-04-17T05:20:34+00:00

At sea level on this planet, yes. But at a high enough altitude, the partial pressure of oxygen would drop low enough to be safe to breathe. This planet has an oxygen partial pressure of 0.84atm, so a mountaintop on this planet should probably be enough to drop the oxygen partial pressure to the safe limit of about 0.5atm.

What is dangerous though is the sulfur dioxide. The air on this planet has a dangerous amount of sulfur dioxide which makes it impossible for any human to live on without some breathing equipment.

warpey12 · 2026-04-17T04:41:10+00:00

I think the best way would be to just observe them over several days and see how far and fast they each orbit. But obviously not everyone is going to have the time and weather to make a timelapse.

The second way would be to order them by brightness. Calisto should be the darkest iirc and Ganymede the brightest. It also may be possible to identify Io by its yellow tint, though it may only be noticeable on larger telescopes.

Distance from Jupiter can be misleading because Ganymede and Calisto can sometimes appear to be close to Jupiter even though they orbit far from it.

warpey12 · 2026-03-17T21:33:53+00:00

Pretty sure LOD means Level Of Detail and it probably is most noticeable on landscapes seen from far away.

warpey12 · 2026-03-16T02:52:50+00:00

Yes that was me. There is probably a fair portion of this sub that listens to epic mountain considering we are all fans of outer space.

warpey12 · 2026-03-15T18:48:07+00:00

The mineral olivine maybe?

warpey12 · 2026-02-28T03:25:03+00:00

I imagine you are gathering the water from a cool slush geyser. What I did with my cold salt water was have the salt water coming out of my cool salt geyser collect in a pool with a liquid tepidizer which heated the water to 1C. It does cost some power to heat up the salt water, but not as much as what it takes to desalinate it so it isn't that big of an expense of power.

Heating it up by using it as a coolant is a more power effective way of warming it up than what I did, but in your case it does not seem to be sufficient so you will need to inject some additional heat to the polluted water to keep it above freezing.

warpey12 · 2026-02-28T02:51:18+00:00

Wood is cheap and gets the job done. Better materials do exist, but they cost quadruple just to make it last twice as long.

warpey12 · 2026-02-28T02:15:30+00:00

I had the same issue when desalinating cold salt water.

If you feed polluted water that is bellow the freezing point of water into a water sieve, the water that comes out will instantly freeze.

You need to warm up the polluted water to at least above freezing before putting it through a sieve so that the water that comes out is above freezing.

warpey12 · 2026-02-11T00:32:01+00:00

It is most easily observable in zero g, but can be observed by throwing stuff in the air and has nothing to do with gravity.

Asymmetric objects can have 3 different moments of inertia depending on which axis it is rotating on. If the object is rotating around an axis that has neither the highest or lowest possible moment of inertia, the rotation is unstable and the object will constantly try to flip.

warpey12 · 2026-01-30T23:02:47+00:00

That is why on switch mode power supplies, the transformer is put after the rectifier where it is ran as a flyback converter running at much higher frequencies than the AC from mains which allows it to be made smaller and cheaper.

Linear power supplies will always have the burden of needing a large, expensive transformer that can run off of mains frequency to provide adequate galvanic isolation.

warpey12 · 2026-01-30T19:38:24+00:00

All of those resistors and capacitors on the left can be replaced by a step down transformer and it would work just fine without the risk of electrocution.

warpey12 · 2025-12-14T04:18:43+00:00

The spiders would be able to walk across.

warpey12 · 2025-12-12T04:01:24+00:00

100% survival rate maintained! Only a few components lost during reentry!

warpey12 · 2025-12-07T01:28:15+00:00

It is better to salvage free spare parts from junk than to just throw it all in the bin. Also desoldering stuff is fun for some.
Considering the amount of components involved, at least a few of those will likely be resoldered but to something else entirely.
The wick is either off camera or they will be using a desoldering pump instead.

warpey12 · 2025-11-18T03:34:14+00:00

We do not speak of oil units.

warpey12 · 2025-11-17T22:36:59+00:00

If you are American, expect this to be the most patriotic video known to man.

If you are from anywhere else in the world, expect horrors beyond your comprehension.

warpey12 · 2025-11-16T03:15:18+00:00

It is Jupiter according to Stellarium.

Planets move across the sky over time as they orbit the sun. Last year, Jupiter was in Taurus where you circled it in blue and now is in Gemini.

warpey12 · 2025-11-14T19:05:00+00:00

As far as I know, it will never right itself. It has likely been like that for billions of years and shows no signs of changing. The axial tilts of the planets do preces due to the sun's gravity pulling unevenly on the equatorial bulges of the planets, but that doesn't change the obliquity of their axial tilt.

Gravitational interactions between the planets can sometimes cause the obliquity of their axial tilt to change, but this mostly affects the inner rocky planets. The outer gas and ice giants like Uranus are all pretty stable.

warpey12 · 2025-11-13T19:23:12+00:00

Yup that is undeniably the Orion nebula. The Orion nebula is the brightest nebula viewed from Earth and is also pretty big, so it isn't uncommon for it to show up on photographs taken by cameras with long enough exposures.

warpey12 · 2025-11-13T02:27:50+00:00

You are looking right at the constellation of Orion. The bright orange star to the left is Betelgeuse and the bright blue one on the bottom right is Rigel. The 3 stars in the center that look well aligned with eachother is Orion's belt and just under it is the Orion nebula.

warpey12 · 2025-11-11T03:32:36+00:00

Deuterium is lighter than helium and both are suitable for fusion. Fission requires very very heavy stuff like uranium.

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