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ChrisA's latest activity
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ChrisA
replied to the thread
Question
ISS Reusability
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Why compare it to the airline fleet? Why not compare Starship to the emission of kitchen stoves in the city of Dallas TX? I think...
Aug 21, 2024
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ChrisA
replied to the thread
Are we alone? Intelligent aliens may be rare, new study suggests
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Yes, if Drake were more honest he would have computed the error bounds by estimating the error bars of each parameter and then we'd know...
Aug 21, 2024
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ChrisA
replied to the thread
SpaceX makes Starlink Roam available throughout the US
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We can't talk about using solar pannels for this terminal until we know its power requirements. Same for batteries, we don't know what...
Aug 21, 2024
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ChrisA
replied to the thread
Earth's days once got 2 hours longer — and that may have triggered one of the biggest evolutionary explosions in history, study suggests
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We only need to "understand gravity" to the level that Isaac Newton did to understand why the Moon is drifting away. We certainly do...
Aug 21, 2024
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ChrisA
replied to the thread
SpaceX makes Starlink Roam available throughout the US
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The article says "Put it in your backpack" but does not say if the device is battery-powered or if it requires access to AC mains power...
Aug 21, 2024
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ChrisA
replied to the thread
Earth's days once got 2 hours longer — and that may have triggered one of the biggest evolutionary explosions in history, study suggests
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When you see a step function, you want to know the cause. The cause of the Moon's slow drifting away is well known and why would there...
Aug 21, 2024
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ChrisA
replied to the thread
Monetizing Space
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Of those only the last one would require humans in space. No. Please don't tell the humans are better then robots. The are today but...
Aug 20, 2024
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ChrisA
replied to the thread
Are we alone? Intelligent aliens may be rare, new study suggests
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THere is an easier way to figure this out. It also agrees with what we observe. If we assume that Earth is not rare or unique and that...
Aug 20, 2024
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ChrisA
replied to the thread
Listen live: NASA providing update about troubled Boeing Starliner astronaut mission today
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There is no compatibility. the plan would be to send two astronauts and two extra space suits. The two in space have known...
Aug 15, 2024
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ChrisA
replied to the thread
Listen live: NASA providing update about troubled Boeing Starliner astronaut mission today
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No. That plan would never have worked. You can not return the test Starliner back to Earth before sending a return vehicle up first...
Aug 14, 2024
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ChrisA
replied to the thread
Can Starliner bring its astronauts home? Boeing, NASA test-fire spacecraft's engines at ISS
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Cooling is different. In space, the valve is surrounded by very insulation, a vacuum. But on Earth, there is air surrounding the...
Aug 8, 2024
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ChrisA
replied to the thread
Life on the moon: Lockheed Martin shares exploration vision for 2044
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I agree that in the end exploration will depend more on human-supervised AI then on Elon Musk's vision of a one million-person city on...
Aug 8, 2024
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ChrisA
replied to the thread
Newborn moon may have had many mini-siblings in Earth orbit long ago
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Is it really so surprising that after a huge off-center collision with a Mars-size planet, there were many chunks of debris flying in...
Aug 8, 2024
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ChrisA
replied to the thread
A Straight Line on the Moon
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You are going to have to put a red circle around your "straight line". I do notice a shadow that appears straight because of the angle...
Aug 5, 2024
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ChrisA
replied to the thread
Does the Future Already Exist?
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What if the "multiple universe" interpretation of quantum mechanics is correct? To summarize, in Schrodinger's cat experiment, the...
Aug 5, 2024
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