Mars

rjsterry
rjsterry Posts: 29,438
in The cake stop
I keep re-watching this. Until now it's been fairly abstract, but suddenly I want to go.

1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
Pinnacle Monzonite

Part of the anti-growth coalition

Comments

  • First.Aspect
    First.Aspect Posts: 17,057
    Do you want to come back?
  • briantrumpet
    briantrumpet Posts: 20,123
    Apparently the material for the parachute came from Tiverton.
    https://www.facebook.com/unanglaisendiois
  • First.Aspect
    First.Aspect Posts: 17,057
    briantrumpet said:

    Apparently the material for the parachute came from Tiverton.

    Touchdown in 5 - 4 - 3 - 2 - drectly.
  • rjsterry
    rjsterry Posts: 29,438
    First.Aspect said:

    Do you want to come back?

    I mean getting rock samples back to Earth is a work in progress, so I'm not making any plans just yet.
    1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
    Pinnacle Monzonite

    Part of the anti-growth coalition
  • focuszing723
    focuszing723 Posts: 8,088
    I wouldn't be interested in going, but find it incredible in such a short period humanity can remotely observe Mars.

    I should take a gravel bike though, with an spd setup.
  • focuszing723
    focuszing723 Posts: 8,088
    edited February 2021
    Galileo Galilei, first person to see Mars via telescope in 1610.
  • focuszing723
    focuszing723 Posts: 8,088
    https://www.youtube.com/watch?v=gYQwuYZbA6o

    Sorry, I meant to post this.
  • rjsterry
    rjsterry Posts: 29,438


    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.
    1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
    Pinnacle Monzonite

    Part of the anti-growth coalition
  • focuszing723
    focuszing723 Posts: 8,088
    That's a good shot.
  • seanoconn
    seanoconn Posts: 11,652
    rjsterry said:

    First.Aspect said:

    Do you want to come back?

    I mean getting rock samples back to Earth is a work in progress, so I'm not making any plans just yet.
    I watched a documentary about a guy who got stranded on Mars. He was pretty unprepared but seemed to manage ok, grow veg in his own poop and everything. Doesn’t look that difficult, I’m sure you’d be fine.
    Pinno, מלך אידיוט וחרא מכונאי
  • rjsterry
    rjsterry Posts: 29,438
    focuszing723 said:

    That's a good shot.

    Using a camera that is 33 million miles away, taking 11 minutes for the signal to get there.
    1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
    Pinnacle Monzonite

    Part of the anti-growth coalition
  • capt_slog
    capt_slog Posts: 3,970
    seanoconn said:

    rjsterry said:

    First.Aspect said:

    Do you want to come back?

    I mean getting rock samples back to Earth is a work in progress, so I'm not making any plans just yet.
    I watched a documentary about a guy who got stranded on Mars. He was pretty unprepared but seemed to manage ok, grow veg in his own poop and everything. Doesn’t look that difficult, I’m sure you’d be fine.
    One of my favourite 'documentaries' :)

    Did you know that the PING sound that accompanies each "Day nnn" is from Pink Floyd's 'Echoes', on the Meddle album?


    The older I get, the better I was.

  • tetley10
    tetley10 Posts: 693
    seanoconn said:

    rjsterry said:

    First.Aspect said:

    Do you want to come back?

    I mean getting rock samples back to Earth is a work in progress, so I'm not making any plans just yet.
    I watched a documentary about a guy who got stranded on Mars. He was pretty unprepared but seemed to manage ok, grow veg in his own poop and everything. Doesn’t look that difficult, I’m sure you’d be fine.
    I saw that as well, looked a piece of pi££ to me. Can't see it being long before your average horticulturist is up there.
  • david37
    david37 Posts: 1,313
    tetley10 said:

    seanoconn said:

    rjsterry said:

    First.Aspect said:

    Do you want to come back?

    I mean getting rock samples back to Earth is a work in progress, so I'm not making any plans just yet.
    I watched a documentary about a guy who got stranded on Mars. He was pretty unprepared but seemed to manage ok, grow veg in his own poop and everything. Doesn’t look that difficult, I’m sure you’d be fine.
    I saw that as well, looked a piece of pi££ to me. Can't see it being long before your average horticulturist is up there.
    horti f in cultralist?
  • focuszing723
    focuszing723 Posts: 8,088
    The atmosphere of Mars is much thinner than Earth's. The average surface pressure is only about 610 pascals (0.088 psi) which is less than 1% of the Earth's value. The currently thin Martian atmosphere prohibits the existence of liquid water at the surface of Mars, but many studies suggest that the Martian atmosphere was much thicker in the past. The highest atmospheric density on Mars is equal to the density found 35 km above the Earth's surface. The atmosphere of Mars has been losing mass to space throughout history, and the leakage of gases still continues today.

    The atmosphere of Mars is colder than Earth's. Owing to the larger distance from the Sun, Mars receives less solar energy and has a lower effective temperature (about 210 K). The average surface emission temperature of Mars is just 215 K (−58 °C/−73 °F), which is comparable to inland Antarctica. The weaker greenhouse effect in the Martian atmosphere (5 °C, versus 33 °C on Earth) can be explained by the low abundance of other greenhouse gases. The daily range of temperature in the lower atmosphere is huge (can range from -75 Celsius to near 0 Celsius near the surface in some regions) due to the low thermal inertia. The temperature of the upper part of the Martian atmosphere is also significantly lower than Earth's because of the absence of stratospheric ozone and the radiative cooling effect of carbon dioxide at higher altitudes.


    Only 1% the atmosphere of Earth! It will be interesting to see how well the helicopter fairs. I wouldn't be surprised if they have it sussed though, if the incredible deployment of the Rover is anything to go by.
  • surrey_commuter
    surrey_commuter Posts: 18,867
    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    Apologies if this is a dumb question but I struggle with the scale of space

    How often would those 3 planets be aligned in that way?
  • rjsterry
    rjsterry Posts: 29,438
    Don't know for that viewpoint, but the Great Conjunction - Saturn and Jupiter appearing close to each other from Earth - happens about once every 20 years. I'd guess not very often.
    1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
    Pinnacle Monzonite

    Part of the anti-growth coalition
  • focuszing723
    focuszing723 Posts: 8,088
    https://www.youtube.com/watch?v=bdlfdBiSzKw
    A new view coming up shortly.
  • capt_slog
    capt_slog Posts: 3,970
    rjsterry said:

    Don't know for that viewpoint, but the Great Conjunction - Saturn and Jupiter appearing close to each other from Earth - happens about once every 20 years. I'd guess not very often.

    Last one was in December, it was quite an interesting sight through my telescope.


    The older I get, the better I was.

  • Charlie_Croker
    Charlie_Croker Posts: 1,727
    surrey_commuter said:

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    Apologies if this is a dumb question but I struggle with the scale of space

    How often would those 3 planets be aligned in that way?
    Your right to ask the question surrey_commuter, I've had a look around the NASA website and I've not seen this image. So it maybe a fake - fake information on twitter! can you believe it? nooooooo

    I think we all stuggle with the size and scale of space
  • rjsterry
    rjsterry Posts: 29,438
    Not helped by all those book illustrations showing the planets of the solar system neatly lined up on two sides of A4.

    This is good. https://joshworth.com/dev/pixelspace/pixelspace_solarsystem.html
    View it on the biggest screen you have and be prepared to zoom in and out.
    1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
    Pinnacle Monzonite

    Part of the anti-growth coalition
  • morstar
    morstar Posts: 6,190
    https://m.youtube.com/watch?v=Kj4524AAZdE

    This is brilliant for our solar system.
  • Pross
    Pross Posts: 43,456
    Charlie_Croker said:

    surrey_commuter said:

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    Apologies if this is a dumb question but I struggle with the scale of space

    How often would those 3 planets be aligned in that way?
    Your right to ask the question surrey_commuter, I've had a look around the NASA website and I've not seen this image. So it maybe a fake - fake information on twitter! can you believe it? nooooooo

    I think we all stuggle with the size and scale of space
    Of course it's fake. No-one has even landed on the moon really let alone put a vehicle on Mars that can send back photos of that resolution.





    :wink:
  • oblongomaculatus
    oblongomaculatus Posts: 616
    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    That's great picture. Do you know which is which?
  • morstar
    morstar Posts: 6,190
    oblongomaculatus said:

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    That's great picture. Do you know which is which?
    Seems unlikely earth is one of them if it isn't a fake.

    https://www.theplanetstoday.com/
  • rjsterry
    rjsterry Posts: 29,438
    morstar said:

    oblongomaculatus said:

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    That's great picture. Do you know which is which?
    Seems unlikely earth is one of them if it isn't a fake.

    https://www.theplanetstoday.com/
    Does look likely that it's either mislabelled or 'embellished'. A shame.
    1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
    Pinnacle Monzonite

    Part of the anti-growth coalition
  • morstar
    morstar Posts: 6,190
    rjsterry said:

    morstar said:

    oblongomaculatus said:

    rjsterry said:



    Earth, Jupiter and Venus as viewed from Mars.

    From @RyanHaecker on Twitter.

    That's great picture. Do you know which is which?
    Seems unlikely earth is one of them if it isn't a fake.

    https://www.theplanetstoday.com/
    Does look likely that it's either mislabelled or 'embellished'. A shame.
    Replace earth with Saturn and it seems a plausible alignment but who knows.
  • rjsterry
    rjsterry Posts: 29,438
    Yes, I thought that, but that website is very deceptive as the orbits are not to scale.
    1985 Mercian King of Mercia - work in progress (Hah! Who am I kidding?)
    Pinnacle Monzonite

    Part of the anti-growth coalition

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