2006-10-28 12:35:47 · 13 answers · asked by james138698 1 in Science & Mathematics ➔ Astronomy & Space
i would say the heliopause. this is the point where particles emitted from the sun (the solar wind) blend with the matter of interstellar space. it's estimated to be 110 AU (about 16.5 billion km or 10.2 billion miles) away from the sun. if an astronaut could get out this far, and measure the radiation with a geiger counter or similar device, the resultant observation should be the same amount of radiation in all directions, including directly towards the sun
however, since the entire solar system is moving through space, there is a 'bow shock' even farther out. this is exactly like how the prow of a ship disturbs water a few feet ahead of the ship itself; the pressure transmits through the water, and creates a region of turbulence
2006-10-28 12:53:46 · answer #1 · answered by gylbertpenguin 2 · 2⤊ 0⤋
It's true that this is an undefined boundary, and I like the heliopause concept, but I would also pose that the boundary of our star system could be considered to be the point at which the gravitational influence of the sun is equal to but no greater than the gravitational influence of any other interstellar gravity source.
2006-10-28 21:36:02 · answer #2 · answered by sparc77 7 · 0⤊ 0⤋
Outermost boundary? If you mean what is the farthest objects in our solar system, it's the Oort Cloud.
2006-10-28 19:46:41 · answer #3 · answered by The Man In The Box 6 · 1⤊ 1⤋
It's beyond the Oort cloud which is close to where the solar wind meets the interstellar medium.
The first Voyager is just about out there now.
2006-10-28 19:38:50 · answer #4 · answered by Anonymous · 0⤊ 0⤋
This is not defined, the International Astronomers Union is still deciding how many planets we have, not to mention how far our Solar System extends.
Roughly, you can put it as the last point an objects rotates around the sun, but that is unofficial.
2006-10-28 19:38:55 · answer #5 · answered by garh760 2 · 0⤊ 1⤋
The Oort cloud. It is a collection of comets and debris out beyond the Kepler belt.
2006-10-28 19:37:55 · answer #6 · answered by bingojaja 2 · 1⤊ 1⤋
The Milky Way.
2006-10-28 19:52:45 · answer #7 · answered by Anonymous · 0⤊ 1⤋
Somewhere beyond Pluto, I would imagine, but I am no expert!
2006-10-28 19:37:25 · answer #8 · answered by Anonymous · 0⤊ 0⤋
pluto is outermost planet
2006-10-28 19:41:24 · answer #9 · answered by sweetahsa13 1 · 0⤊ 2⤋
The van Allen belt.
2006-10-28 19:37:35 · answer #10 · answered by robv1 2 · 0⤊ 3⤋