Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Queen's chemists work with NASA to develop liquids for lunar telescope

11.07.2007
Chemists at Queen's University Belfast are working with NASA and scientists in Canada and the United States to design a telescope that can be stationed on the Moon.

The instrument will have a mirror consisting of a liquid with a thin metal film on its surface that rotates to form a bowl shape, known as a parabola. When the liquid spins in a perfect parabola, it will be able to reflect infrared light from distant stars and galaxies that cannot be picked up by telescopes on Earth because of atmospheric interference and light pollution.

Telescopes with parabolic liquid mirrors are much cheaper and easier to make and maintain than conventional telescopes with glass mirrors. Liquid mirror telescopes employed in observatories on Earth traditionally use mercury as the reflective liquid. However, mercury cannot be used for a lunar liquid mirror telescope as the high-vacuum conditions on the Moon would cause the mercury to boil.

The Queen's team has been investigating the possibility of preparing a reflective liquid for the telescope consisting of an ionic liquid that can be coated on its surface with a thin layer of a reflective metal.

Ionic liquids are liquid salts. They consist essentially of ions (electrically-charged atoms or groups of atoms). Ionic liquids generally have negligible vapour pressures which mean that they do not boil, even under vacuum. Many ionic liquids do not freeze at the sub-zero temperatures found on the Moon. They have the added advantage that they are much lighter than mercury - a key consideration for transporting a telescope to the Moon.

In a report in the June 21 issue of the science journal Nature, the Belfast, Canadian, and U.S. scientists showed that a commercially-available ionic liquid can be coated with silver and that the coated fluid is stable over several months.

"The discovery that an ionic liquid can be coated with a very thin metal layer is a major breakthrough," said chemistry professor, Ken Seddon, who is one of the authors of the report and Director of Queen's University Ionic Liquids Laboratories (QUILL).

The authors also reported that the ionic liquid does not evaporate in a vacuum and remains liquid at temperatures down to 175 K (-98oC). The lunar liquid mirror telescope, however, will require a liquid with an even lower melting point.

Fortunately, there is a phenomenal choice of ionic liquids. More than 1,500 have been described in the scientific literature over the past ten years or so and about 500 are available commercially. According to Seddon, around one million simple ionic liquids are theoretically possible and they can be designed for a wide variety of applications. But most have yet to be prepared.

"We now plan to design and prepare ionic liquids with melting points of around 100 K that can be coated with a reflective metal for the lunar telescope" said Assistant Director of QUILL, Maggel Deetlefs.

Lisa Mitchell | alfa
Further information:
http://www.qub.ac.uk

More articles from Physics and Astronomy:

nachricht NASA detects solar flare pulses at Sun and Earth
17.11.2017 | NASA/Goddard Space Flight Center

nachricht Pluto's hydrocarbon haze keeps dwarf planet colder than expected
16.11.2017 | University of California - Santa Cruz

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>