The Andromeda Galaxy is the nearest large galaxy to the Milky Way at 2.5 million light-years away. It's visible to the naked eye and is on a collision course with our galaxy.
Andromeda Galaxy is 2,537,000 light-years from Earth. That is about 24 quintillion km (14.9 quintillion miles), or 160 billion astronomical units.
| Unit | Distance |
|---|---|
| Light-years | 2,537,000 |
| Kilometers | 2.4 × 10¹⁹ km |
| Miles | 1.49 × 10¹⁹ miles |
| Astronomical units (AU) | 160,000,000,000 astronomical units |
| Parsecs | 778,000 |
Light from Andromeda Galaxy takes 2,537,000 years to reach Earth, so the light you see tonight left Andromeda Galaxy 2,537,000 years ago.
Voyager 1, the fastest object humans have sent into deep space, travels at about 17 km/s. It would need about 44.7 billion years to cover this distance.
Notable For: Nearest large galaxy to the Milky Way, will merge with our galaxy in ~4.5 billion years
At light speed, it would take 2.5 million years. Remarkably, at constant 1g acceleration with deceleration, a traveler would experience only about 28 years due to extreme time dilation, while 2.5 million years pass on Earth.
Yes, Andromeda is approaching us at about 110 km/s and will merge with the Milky Way in approximately 4.5 billion years, forming a new galaxy sometimes called 'Milkomeda.'
Andromeda Galaxy is 2,537,000 light-years from Earth, which is about 24 quintillion km or 14.9 quintillion miles. Light from Andromeda Galaxy takes 2,537,000 years to reach us.
Andromeda Galaxy is 2,537,000 light-years from Earth. One light-year is about 9.46 trillion km, the distance light travels in one year. In parsecs, Andromeda Galaxy is about 778,000 parsecs away.
This time dilation calculator lets you enter a distance in light-years and acceleration in m/s² to see how time dilation affects your journey. It shows differences between traveler and observer times, maximum velocity, energy requirements, Doppler shift, Lorentz factor, and how distances vary between reference frames. Charts appear after you calculate.
Time dilation is an effect from Einstein's theory of special relativity. The faster you move, the slower time passes for you compared to someone standing still. At 90% of light speed, time passes about 2.3 times slower for the traveler than for someone on Earth.
The Time Dilation Formula is:
Where:
t' = time measured by the observer (on Earth)
t = time experienced by the traveler
v = velocity of the traveler
c = speed of light (299,792,458 meters per second)