Interstellar Travel

Interstellar travel means journeying from our solar system to another star. The closest star to our Sun is Proxima Centauri, about 4.2 light-years away. With our fastest spacecraft today, it would take over 70,000 years to get there. Scientists are dreaming up new ways to travel much faster.

Why It Is So Hard

Stars are incredibly far apart. Even light, the fastest thing in the universe, takes over 4 years to reach the nearest star. Our current rockets are much, much slower than light. A spacecraft would need a completely new type of engine to cross the huge distances between stars in a human lifetime.

Ideas for Getting There

Scientists have several ideas for interstellar travel. Light sails could use powerful lasers to push tiny spacecraft to very high speeds. Nuclear engines could be much faster than chemical rockets. Some scientists even study ideas like warp drives that could bend space. These ideas are still in the early stages, but research is happening right now.

Fun Facts

• The Breakthrough Starshot project wants to send tiny spacecraft to Proxima Centauri using laser-powered light sails.
• At the speed of light, it would take about 100,000 years to cross our entire Milky Way galaxy.
• The Voyager 1 spacecraft has left our solar system, but it would take 70,000 years to reach the nearest star.

Did You Know?

Some scientists think that generation ships, where families would live and have children during the journey, might be one way to reach other stars. The trip could take hundreds of years.