Jump to content

Findthepin1

Members
 View Profile  See their activity

  • Posts

    925

  • Joined

  • Last visited

 Content Type 

Posts posted by Findthepin1

    Designing a Venus Cloud Base

    in Science & Spaceflight

    Posted · Edited by Findthepin1
    air-breathing engines

    Return vehicle might be a spaceplane. It's already been done, deploying a plane from an airship. Hang a plane off the bottom of the airship on a rail-runway-thing, that it accelerates on before it runs out of rail-runway-thing and falls a bit before curving back up towards space. Basically a spaceplane that takes off on a runway attached to the bottom of an airship.

    EDIT: Air-breathing engines are possible in the CO2. See here.

    EDIT2: We don't need to worry about Venus' souposphere on ascent because we're starting at a point where the air pressure is equal or possibly less than Earth's datum. So there's actually less delta-v to orbit from the base than there is from Earth's surface to Earth orbit.

    EDIT3: Exactly what materials are available to us from the Venusian atmosphere?

    Ghost Mountains

    in KSP1 Discussion

    Posted · Edited by Findthepin1

    Once, a long time ago, there was a KSP player. They were sitting in their pyjamas at a desk eating a muffin during a blizzard. Playing KSP. During an otherwise flawless, routine Mun mission, this happened.

    QNqkAEn.png

    They promptly took a screenshot and posted it on the KSP Forums.

    ------------------------

    Seriously, what is this? I seem to have created ghost mountains in KSP. My ship was on route to the Mun and it was some ways above Kerbin when I saw this. I'm not sure if it's a glitch. Those are the mountains in the middle of the continent opposite the one KSC is on. The rest of Kerbin looks fine. Has this ever happened to any of you?

    Potentially Habitable Exoplanets

    in Science & Spaceflight

    Posted

    On 31 December, 2015 at 4:12 PM, AngelLestat said:

    I would bet that most of those planets (more massive than earth) that are catalogued as in "habitable zone" will be similar to venus in surface temperature.

    The atmosphere is the main influence in a planet temperature, not the distance to the star.

    Take a look to this table, without greenhouses gases venus would be colder than earth.

    ch10image025.gif

    Pressure is not a big problem for humans, we can survive without problem pressures from 0.2 bar to 15 bar. We would be able to resist much higher pressures (100 bar) if would not be because the oxygen or nitrogen becomes poison under high pressure, so that gives us a high freedom of choice for atmospheres.

    Venus only has a reflectivity of .72 because of the atmosphere. Without atmosphere it would be more like 32° Celsius and an albedo similar to Mars'. It's the clouds. The same thing happens on Earth, to a lesser extent. Actually, removing all the water, life, and air, Earth's albedo would also be similar to Mars'.

    Say 0.25 for Mars, Venus, and Earth (not exactly, but it's close enough). A graph using that is below.

    World Average Distance from Sun (AU) Vacuum Reflectivity Vacuum Average Surface Temperature Actual Reflectivity Air Pressure (kPa) Actual Average Surface Temperature Atmospheric Warming
    Mercury 0.387 11% 164°C 11% Negligible 425°C day, -175°C night -
    Venus 0.723 25% 32°C 72% 9300 462°C 430°C
    Earth 1 25% -17°C 36% 101.3 15°C 32°C
    Mars 1.52 25% -55°C 25% 0.6 -50°C 5°C

    Forgot a sixth column here XD, chose to take out Moon since its parameters don't change between this graph and AngelLestat's. 

    Why did the Soviets launch so many Venus Probes?

    in Science & Spaceflight

    Posted · Edited by Findthepin1

    9 minutes ago, fredinno said:

    *Suphur Dioxide

    Also, Water is a trace gas and difficult to extract from the atmosphere of Venus.

    SO3 plus H2O is H2SO4. For four oxygen atoms to be in it, and only one comes from the water, three must come from the other component. The sun's radiation splits carbon dioxide into carbon monoxide and one oxygen atom. That atom binds to sulphur dioxide to make sulphur trioxide, which combines with water to make sulphuric acid.

    Also, yes, water is difficult to extract from the atmosphere. I was pointing more towards the situation in which any water exists in Earthlike conditions at Venus and so it may hold life.

    Why did the Soviets launch so many Venus Probes?

    in Science & Spaceflight

    Posted · Edited by Findthepin1

    Venus is almost perfectly fine at the ~0.5 bar level (~55 km), at 30 degrees Celsius IIRC. 1 bar is a bit less comfortable at ~70 degrees Celsius. The only issue is the clouds, at around this height there's the middle of the acidic cloud altitudes. If you have protection from that, you can go out with an oxygen mask.

    Also, there's definitely water in that altitude, we know because it's part of the weather cycle. It combines with sulphur trioxide to make the acid rain.

    North Sentinel Island: The Last Uncontacted Tribe on Earth

    in Science & Spaceflight

    Posted · Edited by Findthepin1
    next best thing

    1 hour ago, kmMango said:

    I think I know what you're referring to. Most hilarious first contact ever.:D

    Somewhere out there, there's a relevant XKCD. Gonna look for it now. :D

    EDIT: Next best thing.

    EDIT2: Can't post picture for some reason, the link to it is: https://daveknickerbocker.files.wordpress.com/2012/06/far-side-roy-dooms-humanity.jpg

    North Sentinel Island: The Last Uncontacted Tribe on Earth

    in Science & Spaceflight

    Posted

    17 minutes ago, YNM said:

    I think what's fascinating about them is surviving the 2004 earthquake and tsunami. I mean, with their island really flat, wouldn't a lot of their forest and whatever places they have be destroyed ? Also, uncontacted (in terms of peaceful contact) tribes exists more in New Guinea and Amazon forest.

     

    The whole island lifted up a metre or two during the 2004 quake. They actually gained lots of land.  And they apparently knew about the tsunami and got to high ground before it hit. 

    Traffic stuck

    in The Lounge

    Posted

    I was marooned on a highway today. After two large car crashes happened less than a kilometre ahead of me. I thought I'd be stuck there for days. A couple hours later the traffic began moving again. Then it rained, which was lucky because the traffic was moving again. I have been in another country for a couple weeks visiting family for the holidays. I left this morning. Oy vey, I am lucky to not still be there. They had to airlift something out. Also, it was something like forty kilometres from a shooting range, so we heard that every few minutes the whole time. This wasn't even the first thing I did in 2k16. :)

    Is this alternate solar system possible?

    in Science & Spaceflight

    Posted · Edited by Findthepin1

    Can there be a near-Earth asteroid that has a very high metal content? Like 16 Psyche?

    I propose a binary (like Pluto-Charon) asteroid system of metal type like 16 Psyche. The primary being named Hephaestus and the second being named after me. And there are bubbles inside both with survive pressure inside (?). 

    6 Decades of Space Junk

    in Science & Spaceflight

    Posted · Edited by Findthepin1

    Cool video did you make it 

    Six hundred years of debris on the wall, six hundred years of debris! Take one down, pass it around, five hundred ninety nine years of debris on the wall!

     

    Wait that's 600 again :D Happy New Years 

    Galactic Coordinate System

    in Science & Spaceflight

    Posted · Edited by Findthepin1

    How would you know where an object is in the coordinates? Stars move, planets move. If two people attempt to teleport to the Earth's coordinates at a specific time, but one person does it one second late, they'll be hundreds of kilometers from their destination point.

×
×
  • Create New...