Science
Fact Checked

What is the Farthest Distance a Human Has Ever Been from Earth?

Michael Anissimov
Michael Anissimov
Michael Anissimov
Michael Anissimov

The farthest a human being has ever been from Earth was during the Apollo 13 mission, when Americans James Lovell, Fred Haise, John Swigert passed over the far, or "dark" side of the Moon at an altitude of 158 miles (254 km) from the lunar surface. This works out to approximately 400,171 km (248,655 miles) from earth. This record was achieved at 0:21 UTC on April 15, 1970. The record has stood for almost four decades, and seems unlikely to be surpassed before 2020, when both Japan and the United States are scheduled to return to the Moon. For comparison, the distance between New York and Tokyo is 10,878 km (6,760 miles).

The record was achieved when the mission's original objective, to land two men at the Fra Mauro Highlands on the near side of the Moon, was scrubbed due to an oxygen tank explosion. Instead of landing, the craft was sent into a free return trajectory, using the Moon's gravity as a slingshot to return to Earth. Normally this would have been a simple procedure, but a significant course correction was required, and due to the explosion, ground operators didn't want to risk firing the main engine. So, the lunar module's descent engine was used instead.

The farthest a human has been from Earth is the far side of the Moon.
The farthest a human has been from Earth is the far side of the Moon.

All the manned Moon missions involved one person of the three-person team staying in lunar orbit while the other two visited the surface. The orbital period was about two hours, and the altitude ranged between about four and a hundred miles. Therefore, at least several people came close to matching the distance from Earth record set by the crew of Apollo 13.

Thus far, it is impossible for humans to reach other galaxies.
Thus far, it is impossible for humans to reach other galaxies.

There are no plans for a manned mission to the Moon until 2020, when both the USA and Japan plan to make a visit. The exact specs of these missions are currently unknown, so we don't know for sure whether they'll break the record for furthest person from Earth.

Past 2020, the possibility of a Mars mission is open. If successful, this would shatter the distance record for a human from Earth by a factor of at least 100.

Michael Anissimov
Michael Anissimov

Michael is a longtime AllTheScience contributor who specializes in topics relating to paleontology, physics, biology, astronomy, chemistry, and futurism. In addition to being an avid blogger, Michael is particularly passionate about stem cell research, regenerative medicine, and life extension therapies. He has also worked for the Methuselah Foundation, the Singularity Institute for Artificial Intelligence, and the Lifeboat Foundation.

Michael Anissimov
Michael Anissimov

Michael is a longtime AllTheScience contributor who specializes in topics relating to paleontology, physics, biology, astronomy, chemistry, and futurism. In addition to being an avid blogger, Michael is particularly passionate about stem cell research, regenerative medicine, and life extension therapies. He has also worked for the Methuselah Foundation, the Singularity Institute for Artificial Intelligence, and the Lifeboat Foundation.

You might also Like

Discussion Comments

anon235058

I believe that the reason Apollo 13 traveled the furthest from the Earth was primarily because it passed around the Moon only about six hours before the Moon's apogee (farthest distance in its elliptical orbit around the Earth). That added an order of magnitude greater distance than the unusually high free return orbital pass resulting from the emergency return path. The Apollo missions next closest to the Moon's apogee (10 and 15) were about 40 hours difference.

SilentBlue

Today, we tend to be able to more readily understand and see the big picture due to satellite technologies and software like google earth. The world is changing and distances are being bridged. Perhaps someday soon we will see astronauts going to Mars and experiencing new distances that are unthinkable to the modern mind.

hangugeo112

I can't imagine how horrifying it must have been to fly so far away from the earth and not know if you were going to be completely lost in space. The trauma associated with this kind of experience must have been immense, and the relief upon landing safely on earth as heroes was probably incomparable.

Post your comments
Login:
Forgot password?
Register:
    • The farthest a human has been from Earth is the far side of the Moon.
      By: Zhanna Ocheret
      The farthest a human has been from Earth is the far side of the Moon.
    • Thus far, it is impossible for humans to reach other galaxies.
      By: Mopic
      Thus far, it is impossible for humans to reach other galaxies.
    • Another manned mission to the moon isn't planned until 2020.
      By: Antony McAulay
      Another manned mission to the moon isn't planned until 2020.
    • Though the Apollo 13 mission failed to make it to the moon as planned, the astronauts all survived.
      By: marcel
      Though the Apollo 13 mission failed to make it to the moon as planned, the astronauts all survived.
    • During the Apollo 13 mission, James Lovell, Fred Haise, John Swigert reached the farthest distance ever traveled by a human.
      During the Apollo 13 mission, James Lovell, Fred Haise, John Swigert reached the farthest distance ever traveled by a human.
    • The Apollo 13 mission took humans farther from Earth than any other space mission.
      The Apollo 13 mission took humans farther from Earth than any other space mission.