ChrisA

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    ChrisA 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...

    Monday at 4:45 PM
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    ChrisA 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...

    Monday at 4:35 PM
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    ChrisA 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...

    Jan 23, 2025
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    ChrisA 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...

    Jan 23, 2025
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    ChrisA 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...

    Jan 23, 2025
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    ChrisA 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...

    Jan 16, 2025
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    ChrisA 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...

    Jan 16, 2025
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    ChrisA 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...

    Jan 16, 2025
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    ChrisA 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...

    Jan 16, 2025
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    ChrisA replied to the thread Are James Webb Space Telescope images really that colorful?.

    "We don't know"? Of course we do. If you were to fly out in space and look close up with just you own eyes looking ut a window. All...

    Jan 16, 2025
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    ChrisA replied to the thread NASA wants a 'Super-Hubble' space telescope to search for life on alien worlds.

    Yes, a negative result is informative. This is what SETI gave us. At one time people thought that if we had a sensitive radio...

    Jan 16, 2025
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    ChrisA replied to the thread Blue Origin scrubs 1st New Glenn rocket launch due to technical issue.

    Yes, the coverage was just "filler fluff" to occupy the time. I "watched" but had the sound turned off and most of the window covered...

    Jan 13, 2025
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    ChrisA replied to the thread How to Make a Space Elevator a Viable Operation.

    Your argument is what I call "Standing on a sheet of paper" In theory if you are taller you can see further. In fact it it's obviously...

    Jan 8, 2025
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    ChrisA replied to the thread Sierra Space wants to drop cargo from orbit to anywhere on Earth in 90 minutes.

    Not ISS but Starship. Remembr Yuri Gagarin? Of course, he was the first person in space. His "landing" procedure was to bail out of...

    Jan 8, 2025
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    ChrisA replied to the thread NASA won't decide on Mars Sample Return plan until mid-2026.

    I The way I read it was that only the lander will change. Landing on Mars is =hard and they are looking at reusing the existing Sky...

    Jan 8, 2025

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