# What is the longest journey in space?

### What is the longest journey in space?

The record goes to Russian Valeri Polyakov, who spent 437 days on board the MIR station (from January 8, 1994 to ).

### What is the distance between Earth and the International Space Station?

400 kilometers to what altitude is the ISS? The international space station is approximately 400 kilometers from distance of the Earth.

### Why does it take 23 hours to reach the ISS?

The answer of Philippe Guglielmetti: If you climb vertically the 400 kilometers to the International Space Station (ISS), the latter will smash into you at 7.66 km/s, its orbital speed.

### What are the effects of space travel at the speed of light?

The US Space Agency has released a fun video to describe the effects of near-lightspeed space travel. At this speed, the perception of time and space would be very different.

### What would happen if we traveled at the speed of light?

What would happen if we traveled almost at the speed of light? The US Space Agency has released a fun video to describe the effects of near-lightspeed space travel. At this speed, the perception of time and space would be very different.

### How long does it take to travel at 90% the speed of light?

For example, if we assume that we are traveling at 90% of the speed of light, it would only take slightly more than half the time it takes to reach a destination, compared to the time that elapses on the starting planet. The trip would have lasted only 3 years, while 5 years would have passed on the planet of departure.

### How long was the trip to the starting planet?

The trip would have lasted only 3 years, while 5 years would have passed on the planet of departure. Another element to take into consideration: the hydrogen atoms encountered during the trip, which would not pose a problem in normal times, would become “dangerous particles”.