2006-09-14 14:09:44 · 11 answers · asked by biscuit064 1 in Science & Mathematics ➔ Astronomy & Space
Depends what you mean by "one of ours". If those words mean "one in our Solar System" then no, it would not count as one of ours. If those words mean "one in our galaxy (the Milky Way)" then yes it would count as one of ours,
A third possibility is the words could mean "one in the Local Group of galaxies" of which there are 30 or so, the two big ones being The Andromeda Galaxy and the Milky Way.
It depends on how widely you can identify,
All exoplanets discovered so far are between 10 and 21,500 light years away and revolve around stars that are members of the Milky Way.
The three nearest stars with objects found around them are Epsilon Eridani with 1 planet, tau Ceti with an asteroid belt ten times as massive as ours, and Gliese 876 with three planets, respectiveky 10, 11 and 15 light years away. In Galactic terms, they are our near neighhbours,
2006-09-14 14:35:38 · answer #1 · answered by Mint_Julip 2 · 3⤊ 0⤋
No. The furthest planet that could be considered part of the solar system would have to be closer than the kuiper belt which is less than 1 light day away from the sun. A planet 450 light years away would have to be part of another stars solar system.
2006-09-14 21:16:46 · answer #2 · answered by Picalo911 3 · 0⤊ 0⤋
That doesn't really make any sense but if you are asking how long the planet's year would be is all relative to its orbit around a star in our case. In other words our whole calendar is based on how fast the Earth rotates around the sun, which happens to take 365 days. Time itself cannot pass any differently because it is merely a concept not something that can be changed by the area of the universe you are in. I believe you people are missing the point. One year of time here is the same as one year of time anywhere in the universe. It is just measured differently.
2006-09-14 21:13:25 · answer #3 · answered by mojo2093@sbcglobal.net 5 · 0⤊ 0⤋
According to the new definition (includes "an object must have cleared the neighbourhood around its orbit"), therefore Earth is NOT a planet - neither are Mars, Jupiter and Neptune.
So, let's just wait for "Clarification" of the enw definition, before asking this, shall we ?
2006-09-14 21:17:21 · answer #4 · answered by dryheatdave 6 · 0⤊ 0⤋
No. A light year is the distance light travels in one year. 450 light years is how far a laser (or light) would go in 450 years.
Figure out how many seconds are in one year, multiply it by 450, then multiply that number by "c" - the light constant (299792458 m/s (3e8)) that will give you a distance in meters.
Cheers.
2006-09-15 02:20:45 · answer #5 · answered by Brendan R 4 · 0⤊ 0⤋
No. They tried to be very careful with the new definition for a planet. They said it's only for "the" solar system. Meaning ours. Planets around other stars, that'll be a definition for our kids to ponder.
2006-09-15 11:28:53 · answer #6 · answered by mmmodem123 3 · 0⤊ 0⤋
Uh, no.
A planet within our solar system has to be gravitationally attached to it.
A planet that far away would not feel the effects of our sun directly.
2006-09-14 21:14:45 · answer #7 · answered by Anonymous · 0⤊ 0⤋
No. We have our own bounday. Nearest star is 4 light years away. SO that planet will be of aom other star's
2006-09-14 22:41:00 · answer #8 · answered by Dr M 5 · 0⤊ 0⤋
No. The nearest star to the Sun is closer than that. Of course, we may invade that sector in the future ;)
2006-09-14 21:14:59 · answer #9 · answered by Anonymous · 0⤊ 0⤋
The milky way galaxy is only 200 lightyears big so this planet of your's wouldn't even be in our galaxy!
2006-09-14 21:19:08 · answer #10 · answered by peaceluvnchick 1 · 0⤊ 1⤋