Never!
Posted: Tue Aug 28, 2018 3:12 am
Roger Gilmartin, studied Physics & Computer Science at LMU,
Updated Aug 16...wants to know...
What year do you believe humans will first leave the Milky
Way Galaxy?
Here I stand ready with the ice cold bucket of water, just
waiting to dash your ever-blooming hope for extra-galactic
adventures.
Here it comes.
Generally speaking it takes (at our current propulsion
technology) 4,000 Earth years to travel ONE LIGHT YEAR.
Even an attempt to head straight perpendicular to the
plane of the galaxy would take anywhere from 5,000 to
10,000 light years (or 20,000,000 to 40,000,000 Earth
years. This is a far longer journey than the amount of
time humans have even existed (any hominid species). To
travel along the plane of the galaxy would take much
much longer than that. Please note that the Earth has
an escape velocity; the Solar system has an escape
velocity; and you guessed it - the Milky Way also has
an escape velocity of some 317 km/sec. If you’re still
set on departing the Galaxy and all the time and effort
- here’s maybe something that might give you pause -
once you leave the galaxy, where would you go?
The nearest other galaxy to the Milky Way is (other
than a dwarf galaxy) is the Large Magellanic Cloud -
160,000 light years x 4,000 (or 640,000,000 Earth years).
8,000,000 human lifetimes (averaging 80 years long). My
answer to your question as to what year?
Never.
56892 UPDATE:
According to space.com, the Parker Solar Probe will
reach a speed of 430,000 mph (700,000 kp/h) - if that
is true and if we can propel our craft (without massive
gravitational-well participation), we can trim some
of the durations for space travel. For example, using
the new speeds we can now travel one light year is
1,619 Earth years - getting to Alpha Centauri is only
6,962 years away; getting out of the galaxy (the Milky
Way still has an escape velocity that has to be reckoned
with) now will take (for a perpendicular pathway) between
8,095,000 to 16,190,000 years! The Large Magellanic
Cloud is now only 259,040,000 Earth years away (personally,
there’s a lot to see here in the Milky Way - we can do a
“staycation”). Most of everything we would like to do in
space (outside of the local Solar System), because of
distance will remain out of reach.
https://en.wikipedia.org/wiki/Orphans_of_the_Sky
Updated Aug 16...wants to know...
What year do you believe humans will first leave the Milky
Way Galaxy?
Here I stand ready with the ice cold bucket of water, just
waiting to dash your ever-blooming hope for extra-galactic
adventures.
Here it comes.
Generally speaking it takes (at our current propulsion
technology) 4,000 Earth years to travel ONE LIGHT YEAR.
Even an attempt to head straight perpendicular to the
plane of the galaxy would take anywhere from 5,000 to
10,000 light years (or 20,000,000 to 40,000,000 Earth
years. This is a far longer journey than the amount of
time humans have even existed (any hominid species). To
travel along the plane of the galaxy would take much
much longer than that. Please note that the Earth has
an escape velocity; the Solar system has an escape
velocity; and you guessed it - the Milky Way also has
an escape velocity of some 317 km/sec. If you’re still
set on departing the Galaxy and all the time and effort
- here’s maybe something that might give you pause -
once you leave the galaxy, where would you go?
The nearest other galaxy to the Milky Way is (other
than a dwarf galaxy) is the Large Magellanic Cloud -
160,000 light years x 4,000 (or 640,000,000 Earth years).
8,000,000 human lifetimes (averaging 80 years long). My
answer to your question as to what year?
Never.
56892 UPDATE:
According to space.com, the Parker Solar Probe will
reach a speed of 430,000 mph (700,000 kp/h) - if that
is true and if we can propel our craft (without massive
gravitational-well participation), we can trim some
of the durations for space travel. For example, using
the new speeds we can now travel one light year is
1,619 Earth years - getting to Alpha Centauri is only
6,962 years away; getting out of the galaxy (the Milky
Way still has an escape velocity that has to be reckoned
with) now will take (for a perpendicular pathway) between
8,095,000 to 16,190,000 years! The Large Magellanic
Cloud is now only 259,040,000 Earth years away (personally,
there’s a lot to see here in the Milky Way - we can do a
“staycation”). Most of everything we would like to do in
space (outside of the local Solar System), because of
distance will remain out of reach.
https://en.wikipedia.org/wiki/Orphans_of_the_Sky