# How Close Are We To Space Travel?

## How close are we to interstellar travel?

Interstellar distancesAs of January 25, 2020, Voyager 1, the farthest human-made object from Earth, is 148.7 AU away.

The closest known star, Proxima Centauri, is approximately 268,332 AU away, or over 9,000 times farther away than Neptune.

## Will space travel ever be possible?

Intergalactic travel for humans is therefore possible, in theory, from the point of view of the traveller. Accelerating to speeds closer to the speed of light with a relativistic rocket would allow the on-ship travel time to be drastically lower, but would require very large amounts of energy.

## How fast can we travel in space with current technology?

For comparison, the Voyager 1 spacecraft, launched back in 1977, is currently traveling at about 38,000 mph (61,000 km/h), according to NASA — less than 10 percent of the Parker Solar Probe’s peak speed.

## How many people have died going to space?

As of 2020, there have been 14 astronaut and 4 cosmonaut fatalities during spaceflight. Astronauts have also died while training for space missions, such as the Apollo 1 launch pad fire which killed an entire crew of three. There have also been some non-astronaut fatalities during spaceflight-related activities.

## Can humans travel light years?

Interstellar distancesAs of January 25, 2020, Voyager 1, the farthest human-made object from Earth, is 148.7 AU away. Light in a vacuum travels around 300,000 kilometres (186,000 mi) per second, so 1 light-year is about 9.461×1012 kilometers (5.879 trillion miles) or 63,241 AU.

## Can humans travel the speed of light?

“There is no real practical limit to how fast we can travel, other than the speed of light,” says Bray. Light zips along at about a billion kilometres per hour. Therefore, humans should – in theory – be able to travel at rates just short of the “Universe’s speed limit”: the speed of light.

## How cold is space?

Space is just above that, at an average temperature of 2.7 Kelvin (about minus 455 degrees Fahrenheit). But space is mostly full of, well, empty space. It can’t move at all. It’s the very diffuse gases and grains that drift through the cosmos whose temperature we can measure.

## How empty is space?

Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays.

## Will humans ever travel to other galaxies?

Intergalactic travel for humans is therefore possible, in theory, from the point of view of the traveller. Traveling to the Andromeda Galaxy, 2 million light years away, would take 28 years on-ship time with a constant acceleration of 1g and a deceleration of 1g after reaching half way, to be able to stop.

## What is the fastest thing in space?

Within our solar system, Mercury, the messenger of the gods, is the fastest-moving planet, with an orbital speed of about 48 kilometres per second; Earth manages only about 30 km/s.

## Is there a max speed in space?

For centuries, physicists thought there was no limit to how fast an object could travel. But Einstein showed that the universe does, in fact, have a speed limit: the speed of light in a vacuum (that is, empty space). Nothing can travel faster than 300,000 kilometers per second (186,000 miles per second).

## How fast is 20% the speed of light?

Traveling at around 20 percent the speed of light—so as fast as 100 million miles per hour—the craft and their tiny cameras would aim for the smallest but closest star in the system, Proxima Centari, and its planet Proxima b, 4.26 light-years from Earth.