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CChrisA replied to the thread I want to believe — but yet another massive search for alien technosignatures just turned up nothing.Yes. Both are looking for confirmation of a belief that is not based on reason. So many people want Star Trek to be true or for...
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CChrisA replied to the thread City-killer' asteroid 2024 YR4 could hit the moon instead of us, scientists say.And by your argument, if I stood on a sheet of newspaper I could see farther. Everyone knows that if you are taller you can see...
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CChrisA replied to the thread I want to believe — but yet another massive search for alien technosignatures just turned up nothing.Negative results are still "Good Science". What we are learning or have learned is that technological civilizations are at least...
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CChrisA replied to the thread Boom Supersonic's XB-1 jet breaks sound barrier 3 times on final test flight (video, photos).People are asking why the test program ends so early. I think because the entire point of the test flight was to validate the company's...
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CChrisA replied to the thread Perseverance Mars rover finds 'one-of-a-kind treasure' on Red Planet's Silver Mountain.Can a 2026 version of Starship land with any payload mass, or would the ship have to be empty? If we wait some years we will have a...
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CChrisA replied to the thread Perseverance Mars rover finds 'one-of-a-kind treasure' on Red Planet's Silver Mountain.Yes. Starship just might have enough capability to take an actual payload to Mars. It would be harder to land with the added weight...
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CChrisA replied to the thread Trump wants the US to land astronauts on Mars soon. Could it happen by 2029?.We can easily guess where the idea of sending people to Mars in 2029 comes from. Elon Musk clearly wants a huge contract with NASA to...
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CChrisA replied to the thread Trump wants the US to land astronauts on Mars soon. Could it happen by 2029?.The big problem with the 2029 date is the Earth-to-Mars launch windows. No matter how much money you have, you can only launch to Mars...
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CChrisA replied to the thread Beam me to the stars: Scientists propose wild new interstellar travel tech.This idea only works if somehow the space probe can store the energy from the beam and then convert the stored energy to thrust. The...
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CChrisA replied to the thread Beam me to the stars: Scientists propose wild new interstellar travel tech.But we are talking about a spacecraft that is powered by an electron beam. We have to assume there is some like oc beam receiver that...
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CChrisA replied to the thread Beam me to the stars: Scientists propose wild new interstellar travel tech.Let's assume this works. What happens if there is a tiny spec of dust ahead of the spacecraft's path? The dust would hit the...
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CChrisA replied to the thread Are James Webb Space Telescope images really that colorful?.To detect life by directly imaging it, You need a telescope hundreds of thousands or perhaps hundreds of millions of miles wide. It...
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CChrisA replied to the thread Are James Webb Space Telescope images really that colorful?.No. Any earth-link planet would be so close to its star that it would be drowned out with glare. You need a "coronagraph". to...
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CChrisA replied to the thread Can I ask someone to rebuttal my argument against human space flight?.The only good argument for manned spaceflight is the same argument we use to justify "summer vacation". There is no economic...
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CChrisA replied to the thread SpaceX catches Super Heavy booster on Starship Flight 7 test but loses upper stage (video, photos).Today we saw a kind of symmetry. Blue Origin's NG-1 launched in the early morning. The second stage reached orbit but the first...
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