Space and Time.
Current fastest vehicle velocity = 38 kps (Juno –earth slingshot)
Orbital speed of Mercury = 48 kps
Voyager 2 : 16 kps
c = 300,000 kps
Not correct scale!
Distance Light travels in 1 year
9.46 x 1012 Km
Nearest Neighbour
3.97 x 1013 Km
Travelling @ 16 km/s
Time taken = 79,000 years.
Or……
accelerate at 2m/s2 for 4.5 years to 0.93c
accelerate at 2m/s2 for 4.5 years
Total travel time = 9 years.
v=2.8*108 m/s
ΔV
ln(mi /m f )=
I sp g o
????
Need to find fuel on the way.
Hydrogen density in space between stars
1 to 1000 atoms per cm3
Bussard Ramjet.
How to get a lot of
construction material into orbit
Space elevator ???