MessageToEagle.com

Interstellar Beacons Might One Day
Navigate Future Astronauts Across The Universe

30 March, 2012

MessageToEagle.com - The use of stars, planets and stellar constellations for navigation was of fundamental importance for mankind for thousands of years.

Have you ever asked yourself how the starship Enterprise in the TV series Star Trek found its way through the depths of space?

Cosmic lighthouses called pulsars might be the key to this interstellar navigation - not only in science fiction but also in the near future of space flight.

Now a group of scientists at the Max-Planck Institute for Extraterrestrial Physics in Garching, Germany have developed a new technique using a special population of stars to navigate not on Earth, but in voyages across the universe.

Team member Prof. Werner Becker will present their work at the National Astronomy Meeting in Manchester on Friday 30 March.

When stars much more massive than our Sun reach the end of their lives, their final demise is marked by a dramatic supernova explosion that destroys most of the star.

But many leave behind compact, incredibly dense remnants known as neutron stars. Those detected have strong magnetic fields that focus emission into two highly directional beams.

The neutron star rotates rapidly and if the beam points in the direction of the Earth we see a pulse of radiation at extremely regular intervals – hence the name pulsar.



Artist’s impression of Rosetta, if it navigated in deep space using pulsar signals. Credit: RAS / Rosetta (courtesy of ESA)


Prof. Becker and his team are developing a novel navigation technology for spacecraft based on the regular emission of X-ray light from pulsars. Their periodic signals have timing stabilities comparable to atomic clocks and provide characteristic time signatures that can be used as natural navigation beacons, similar to the use of GPS satellites for navigation on Earth.

By comparing the arrival times of the pulses measured on board the navigator spacecraft with those predicted at a reference location, the spacecraft position can be determined with an accuracy of few kilometres, everywhere in the solar system and far beyond.



Artist’s impression of spaceship Enterprise, navigating in deep space using pulsar signals. Credit: RAS / starship Enterprise from the TV series Star Trek. Compilation by MPE


At the moment even the fastest spacecraft would take thousands of years to travel to the nearest star and far longer to explore the wider Galaxy so we are unlikely to see journeys like this happen for many centuries.

Nonetheless, the pulsar-based navigation system could be in use for astronauts in the future.



Artist’s impression of spaceship Enterprise, navigating in deep space using pulsar signals Credit: RAS / starship Enterprise from the TV series Star Trek. Compilation by MPE


He adds: “Looking forward, it’s incredibly exciting to think that we have now the technology to chart our route to other stars and may even be able to help our descendants take their first steps into interstellar space.”

MessageToEagle.com via RAS/mpe.mpg.de

See also:
Asteroid Mining Operations Could Reveal Intelligent Extraterrestrial Civilizations

Most Alien World We Can Only Imagine

Countless Earthlike Alien Worlds That Will Never Be Like Earth

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There could be hundreds, even thousands, of intelligent civilizations in the Milky Way, but not all of them can be classified as interstellar travellers. Many civilizations might simply lack sufficient technology to travel among the stars. Nevertheless, just like humans other intelligent alien species could seek contact with their galactic neighbors. Have we already detected such alien signals without being able to identify their true nature?

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