Recent comments in /f/space

ryschwith t1_jdrg5hs wrote

Reply to Discussion on Time relativity near black holes by AGARAN24

> So then wth is time … ? How do we even define time then?

Welcome to the giant mindfuck that is modern physics. We don’t know! We have hints that time isn’t the logical and linear progression of causes and effects that we observe it to be, and we’re very early in understanding what that actually means.

We don’t even know what “now” is.

As near as I can parse your hypothetical scenario, you would experience 24 hours of time and watch all of the Universe around you (including the black hole) rapidly decay into heat death. Although it gets slightly more complicated because as the black hole evaporates that’ll effect the magnitude of time dilation you experience.

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bookers555 t1_jdrfgvc wrote

Reply to comment by GraveSlayer726 in Latest video of the Ingenuity Mars Helicopter kicking up dust and taking off for Flight #47. Ingenuity is well beyond its warranty at this point. The video was captured by the Mastcam-Z imager aboard NASA’s Perseverance rover on March 9, 2023. by ICumCoffee

It depends on how much dust there is nearby and the time of day, but sometimes it can kinda look blueish. Normally it ranges around white, grey and brown.

https://qph.cf2.quoracdn.net/main-qimg-439f6d2ff0d3ec015a5ab5b184fef365

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bookers555 t1_jdrfc4p wrote

Reply to comment by verdi83 in Latest video of the Ingenuity Mars Helicopter kicking up dust and taking off for Flight #47. Ingenuity is well beyond its warranty at this point. The video was captured by the Mastcam-Z imager aboard NASA’s Perseverance rover on March 9, 2023. by ICumCoffee

Nothing controlled remotely in space is operated via direct input like if it was an RC car.

In this case they introduce commands that basically tell it "fly up X meters, go forward X meters, land, shut down engine".

Spacecraft function in a similar way, and in certain situations they can also act automatically.

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danielravennest t1_jdres22 wrote

Reply to comment by xaeru in [NASA on Twitter] Newly-discovered asteroid 2023 DZ2 will pass Earth more than 100,000 miles (161,000 km) away–about half the distance to the Moon–making its close approach at 3:51 p.m. EDT (12:51 p.m. PDT) by ICumCoffee

Unknown. This asteroid was only discovered a month ago. To make long-term predictions you need to know the current orbit precisely. It hasn't been watched long enough to do that yet. The close pass will help. They can use radar to get some very good measurements

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Nulovka t1_jdrdztf wrote

Reply to comment by daenel in Uranus atmospheric changes while slowly reaching the Summer Solstice by daenel

The white area appears to be getting brighter because we are seeing it more directly. Looking at it obliquely it's more faded much like looking at the sun on the horizon is more faded that when overhead because we are looking obliquely through the atmosphere. Look at the orientation of the debris ring. The dimmer view of the planet is more oblique. The white area also appears the same size going down to the same general latitude, it just looks bigger when you can see more of it.

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UTokeMids t1_jdrdj7g wrote

Reply to comment by astro_pettit in My camera setup on the International Space station. More details in comments. by astro_pettit

This is one of the coolest posts i’ve seen in a while, thank you for sharing your career with us. Out of the hundreds of thousands of photos you’ve taken - have you ever captured something that you couldn’t explain/identify? I’m sure there’s a chance you’ve been asked this many times so if that’s the case i apologize. It’s just rare to have the chance to correspond with an astronaut which is why i appreciate your post so much. I used to have dreams about being in a space pod but not knowing how to work the controls lol. I wish i could be an “astronaut assistant” and go to space and just be a helper. Too bad there is no such thing lol, but it’s my number one goal to make it to space before i die.

Also do you have a recommendation for a somewhat affordable camera for a young guy just getting into photography? I mainly would be taking pictures of nature, animals, and architecture. Also maybe portraits. I know next to nothing about photography tech but appreciate any advice, especially advice from an astronaut or any other fine folks with knowledge.

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