Featured Research

from universities, journals, and other organizations

An Astronomy First: Telescopes Double-Team Hawaiian Night Sky

Date:
March 15, 2001
Source:
NASA/Jet Propulsion Laboratory
Summary:
Proving that two telescopes are better than one, NASA astronomers have gathered the first starlight obtained by linking two Hawaiian 10-meter (33-foot) telescopes. This successful test at the W.M. Keck Observatory on Mauna Kea makes the linked telescopes, which together are called the Keck Interferometer, the world's most powerful optical telescope system.

Proving that two telescopes are better than one, NASA astronomers have gathered the first starlight obtained by linking two Hawaiian 10-meter (33-foot) telescopes.

Related Articles


This successful test at the W.M. Keck Observatory on Mauna Kea makes the linked telescopes, which together are called the Keck Interferometer, the world's most powerful optical telescope system. The project will eventually search for planets around nearby stars and help NASA design future space-based missions that can search for habitable, Earth-like planets.

"Successfully combining the light from the two largest telescopes on Earth is a fabulous technical advancement for science," said Dr. Anne Kinney, director of NASA's Astronomical Search for Origins program, which includes the Keck Interferometer project. "Using them in this way gives us the equivalent of an 85-meter (279-foot) telescope. This will open the possibility of obtaining images with much greater clarity then ever before possible."

"This is a major step in the creation of a whole new class of astronomical telescopes that will have an enormous impact on future knowledge," said Dr. Paul Swanson, the Keck Interferometer project manager at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "Historically, breakthrough technologies like the Hale 5- meter (200-inch) and the Hubble Space telescopes have made discoveries way beyond the purpose for which they were originally built."

Monday night, March 12, starlight from HD61294, a faint star in the constellation Lynx, was captured by both Keck telescopes and transported across a sophisticated optical system across the 85 meters (275 feet) separating the two telescopes. In an underground tunnel that links the telescopes, the collected light waves were combined and processed with a beam combiner and camera. In order to properly phase the two telescopes, adaptive optics on both telescopes removed the distortion caused by the Earth's atmosphere. In addition, the optical system in the tunnel adjusted the light path to within a millionth of an inch.

Testing of the Keck Interferometer will continue for the next several months. Limited science operations, including the search for planets, are expected to begin this fall. Scientists around the world will soon be invited to propose studies they would like to conduct using the Keck Interferometer. Their proposals will undergo a formal review and selection process.

Since 1995, astronomers have discovered almost 50 planets orbiting other stars. With current technology, they can find very large, Jupiter-like planets, 300 times as massive as Earth, that are located close to their parent stars. Such planets are not likely to harbor life. The Keck Interferometer will be able to detect planets farther from their parent stars, which means their reflected light would be dimmer and harder to detect.

The unique pairing process will help pave the way for future interferometers in space, such as the Terrestrial Planet Finder, which will look for Earth-like planets. "This first light from the Keck Interferometer marks a dramatic step forward and will help us accomplish the ultimate goal of the Origins Program -- to search for signs of life beyond by examining the light from 'Earths' orbiting nearby stars," said Dr. Charles Beichman, the Origins chief scientist at JPL.

An interferometer uses multiple telescopes to gather light waves, then combines the waves in such a way that they interact, or "interfere" with each other. A similar phenomenon can be observed by throwing a rock into a lake and watching the resulting ripples, or waves. If a second rock is thrown into the water, the new set of waves either bumps up against the first set and changes its pattern, or it joins together with the first set, making larger, more powerful waves. In astronomy, the idea is to combine the light waves from the multiple telescopes to simulate a much larger telescope. This enables scientists to capture images of much smaller objects or to determine their size or position with much greater accuracy.

The development of the Keck Interferometer is managed by JPL for NASA's Office of Space Science, Washington, D.C. JPL is a division of the California Institute of Technology in Pasadena. The W.M. Keck Observatory is funded by Caltech, the University of California and NASA, and is managed by the California Association for Research in Astronomy, Kamuela, Hawaii.

Additional information and images are available at http://www.jpl.nasa.gov/pictures/keck and http://origins.jpl.nasa.gov .


Story Source:

The above story is based on materials provided by NASA/Jet Propulsion Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

NASA/Jet Propulsion Laboratory. "An Astronomy First: Telescopes Double-Team Hawaiian Night Sky." ScienceDaily. ScienceDaily, 15 March 2001. <www.sciencedaily.com/releases/2001/03/010315080053.htm>.
NASA/Jet Propulsion Laboratory. (2001, March 15). An Astronomy First: Telescopes Double-Team Hawaiian Night Sky. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2001/03/010315080053.htm
NASA/Jet Propulsion Laboratory. "An Astronomy First: Telescopes Double-Team Hawaiian Night Sky." ScienceDaily. www.sciencedaily.com/releases/2001/03/010315080053.htm (accessed November 24, 2014).

Share This


More From ScienceDaily



More Space & Time News

Monday, November 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Soyuz Spacecraft Docks With International Space Station: NASA

Soyuz Spacecraft Docks With International Space Station: NASA

AFP (Nov. 24, 2014) A Russian Soyuz spacecraft carrying Italy's first female astronaut safely docks with the International Space Station, according to NASA. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Multi-National Crew Safely Docks at Space Station

Multi-National Crew Safely Docks at Space Station

Reuters - US Online Video (Nov. 24, 2014) A Russian Soyuz rocket delivers a multi-national trio to the International Space Station. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Raw: Soyuz Docks With Int'l Space Station

Raw: Soyuz Docks With Int'l Space Station

AP (Nov. 23, 2014) A Russian capsule carrying three astronauts from Russia, the United States and Italy has arrived at the International Space Station. (Nov. 23) Video provided by AP
Powered by NewsLook.com
Raw: Crew Blasts Off for Int'l Space Station

Raw: Crew Blasts Off for Int'l Space Station

AP (Nov. 23, 2014) A Russian capsule carrying three astronauts from Russia, the United States and Italy has blasted off for the International Space Station. (Nov. 23) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins