Aliens

[edepot]

Speed of Light: 299,792,458 m/s (meters per second).
One Light year distance: 9,454,254,955,488,000 meters.

Max Speed of Voyager 2: 16,080 m/s (35,970 mph).

Time For Voyager 2 to Travel One Light Year: ~18,644 years.

Distance of Earth to Closest Star: 4.2 light years. (Proxima Centauri)
Time For Voyager 2 to Travel to Proxima Centauri: ~78,305 years.

Size of Milky Way Galaxy: 100,000 light years across.
Time For Voyager 2 to Travel Across Galaxy: ~1,865,438,096 years.
Time For Voyager 2 to Travel Half Way: ~932,719,048 years.

Distance of Earth to Closest Galaxy: 2,500,000 light years. (Andromeda)
Time For Voyager 2 to Andromeda: ~46,635,952,390 years.

Age of Universe: 13,705,000,000 years.
Age of Solar System: 4,568,000,000 years.
Age of Earth: 4,540,000,000 years.
Age of Human: ~100 years.

Age of Sun: 4,540,000,000 years.
Time Until Sun Dies: 5,000,000,000 years.
Total Sun Age: 9,500,000,000 years.

Aliens must reach us in 5 billion years, or we will perish. We are near the middle between the core and the edge of the Milky Way. Stars outside Milky Way are too far away, If they use Voyager 2 speed. Same in reverse (we finding planets with alien life).

http://tzontonel.files.wordpress.com/20 ... e-map1.jpg

Light years away Voyager 2 can reach before Sun dies: 268,182 light years.

Number of stars in Milky Way: ~200,000,000,000 (to maybe 400 billion).
Number of years left: 5,000,000,000

We need to send 40 probes to 80 probes a year in order to visit all the stars in the Milky Way.