Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Ground - based observatories join forces with Venus Express

Data from Venus Express, which has been revealing new and crucial details about our closest planetary neighbour, will now be augmented by synoptic data from a coordinated ground-based observation campaign.

This campaign will contribute to the growing body of information on the nature of Venus’s atmosphere and will help put the spacecraft’s observations into a broader context.

Between 23 May and 9 June, scientists working at a dozen telescopes and observatories spread all over the world will examine Venus from the ground and perform measurements, some of which are not feasible for Venus Express.

By applying different techniques and performing measurements at wavelengths that are not within the capabilities of the spacecraft, scientists intend to complement the existing dataset and obtain simultaneous measurements and cross-validation of the spacecraft’s observations.

Thus the ground-based observations - radio, submillimetre, infrared and visible - are very useful for interpretation of Venus Express results.

The main focus of the ground-based observations is on measurements of the atmosphere above Venus’ cloud tops. This will complement Venus Express’ capability to study the cloud layer in high detail and the lower atmospheric altitudes, down to the surface.

Spectroscopy at visible, infrared and submillimetre wavelengths from ground-based observatories will enable direct measurements of the wind and unearth fresh data about the mesosphere and the thermosphere, two atmospheric layers situated above Venus’ cloud deck.

This directly complements Venus Express, which determines wind characteristics by tracking motions of the clouds and studies the distribution of gaseous species and temperatures in Venus’ upper atmosphere.

Following on Venus Express’ investigations, the ground-based observations will perform studies of Venus’ oxygen airglow emission – a phenomenon detectable on the night-side that makes the planet glow – and study the composition of the mesosphere and the deep atmosphere.

The timeframe of the ground-based campaign, which extends from 23 May to 9 June, was chosen for different reasons. The most important reason is the fact that Venus is close to its maximum elongation, that is its maximum angular distance from the Sun as seen from Earth, during this period. This is a favourable position for observations of both its day and night sides from Earth.

The time window also encompasses the Venus flyby of NASA’s Messenger on 6 June at 1:10 CEST, en route to its final destination, Mercury. For one day, Messenger’s observations of Venus will also complement those from Venus Express and ground.

Who is involved?

The telescopes involved in the Venus ground-based observation campaign are:

CFHT: Canada-France-Hawaii Telescope, Hawaii
OHP: Observatoire de Haute Provence, France
VLT: Very large Telescope, Chile
Observatoire du Pic du Midi, Telescope Bernard Lyot (TBL), France
IRAM: Institut de Radio-Astronomie Millimetrique, Spain
IRAM PdB: Institut de Radio-Astronomie Millimetrique: antennae at Plateau de Bures, France
JCMT: James Clerk Maxwell Telescope, Hawaii
Nobeyama: Radio Observatory, Japan
HHT: Heinrich Hertz Submillimeter Telescope Observatory, Arizona, USA
Kitt Peak National Observatory, Arizona, USA
IRTF: Infrared facility, Hawaii
AAT: Anglo-Australian Telescope, Siding Spring Mountain in north-western New South Wales, UK

Keck telescope (Hawaii)

Ground - based campaigns for previous missions

“Previous examples demonstrate the importance of connecting space-borne observations with the synoptic coverage provided by continued ground-based programmes,” said Emmanuel Lellouch, Venus Express Supporting Investigator and coordinator of the ground-based observation campaign.

One of the recent ground-based observation campaigns in support of a scientific mission was conducted during the Huygens probe’s descent and landing on Titan on 14 January 2005. As Huygens parachuted to the surface of Titan, a battery of radio and optical telescopes around the world were watching and listening.

The observations brought in new information on the atmosphere and surface properties of Saturn’s largest moon. They also provided information about the probe’s drift in the winds and thus helped to reconstruct the descent trajectory and the coordinates of the landing site.

Other supporting ground-based observations were successfully performed for other scientific missions such as ESA’s SMART-1 which flew to the Moon and NASA’s Deep Impact which flew to comet 9P/Tempel 1.

There are also a large number of amateur astronomers watching Venus regularly, obtaining excellent images to complement data from observatories. During the current campaign, Venus is particularly bright and thus easily observable, even with small telescopes – for amateurs’ viewing pleasure.

Olivier Witasse | alfa
Further information:

More articles from Physics and Astronomy:

nachricht Move over, lasers: Scientists can now create holograms from neutrons, too
21.10.2016 | National Institute of Standards and Technology (NIST)

nachricht Finding the lightest superdeformed triaxial atomic nucleus
20.10.2016 | The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences

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: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

New method increases energy density in lithium batteries

24.10.2016 | Power and Electrical Engineering

International team discovers novel Alzheimer's disease risk gene among Icelanders

24.10.2016 | Life Sciences

New bacteria groups, and stunning diversity, discovered underground

24.10.2016 | Life Sciences

More VideoLinks >>>