After evaluating the findings of Webb's independent review board, NASA has established , as the new launch date for the James Webb Space Telescope.
The revised launch schedule accommodates performance challenges experienced during integration and testing of Webb's sunshield and propulsion system. More time is also needed to verify the integrity of the spacecraft element, join it to the telescope element, and perform environmental testing on the assembled observatory.
Rigorous evaluation of each part of Webb is crucial to mission success. When it is launched from French Guiana, the telescope will be folded inside the nose of an Ariane 5 rocket and subjected to high levels of vibration and noise. All of its sensitive components must be able to withstand launch and the harsh conditions of space.
The Canadian Space Agency continues to support the development of NASA's most ambitious and complex space observatory ever built. With the help of Canadian instruments, Webb will enable world-class science that sheds light on the most profound mysteries of our universe.
Credit: NASA/Chris Gunn
New launch window for the James Webb Space Telescope
In light of the results of an independent assessment, Webb's launch window has now been set for approximately . It was determined that more time would be required for rigorous testing and assembly of the observatory.
In early , the telescope element, which contains two Canadian instruments, was shipped to California to be joined to the spacecraft element. While these elements have been tested individually, the new window will allow more time for the fully assembled space observatory to be put through its paces.
Once its two major elements are united, Webb will be tested as a whole, to verify that the 6,100-kg telescope can withstand the vibrational, acoustic, and thermal conditions it will face during launch and operation.
The European Space Agency (ESA) is providing the Ariane 5 rocket that will deliver Webb to space. In the coming months, NASA and ESA will collaborate to decide upon a new launch readiness date.
The Canadian Space Agency (CSA) is proud to be part of this important project et will continue to support its partners during these critical tests. Thanks to the CSA's participation in the Webb telescope Canadian astronomers will have access to observation time for unique astronomy research.
OTIS arrives in California for Webb's final assembly
On February 2, Webb's Optical Telescope and Integrated Science (OTIS) module arrived at Northrop Grumman in Redondo Beach, California.
Shipping OTIS to the aerospace company was no easy task. NASA engineers carefully packed the telescope and instrument segment into a massive shipping pallet and loaded it into the cargo hold of the US military's largest transport aircraft.
Webb, an international collaboration between NASA, the European Space Agency and the Canadian Space Agency, will be the most powerful telescope ever built. It is set to launch into space aboard an Ariane 5 rocket in spring .
Space Telescope Science Institute seeks research proposals for first cycle of Webb observations
The observing time will be used by scientists to conduct innovative research in many areas of astronomy and astrophysics, including cosmology, galaxies and massive black holes, stars and stellar systems, exoplanets and outer solar system objects.
There are up to 6,000 hours available, which will be allotted as follows:
Small proposals (25 hours or less requested): 3,500 hours
Medium proposals (more than 25 hours but less than or equal to 75 hours requested): 1,500 hours
Large proposals (more than 75 hours requested): 1,000 hours
Proposals must be submitted by April 6, 2018, at 8:00 p.m. (EDT). The winning selections will be announced in July 2018.
James Webb Space Telescope comes in from the cold with the completion of cryogenic checks
To the envy of all Canadians bracing for winter, the James Webb Space Telescope's exposure to deep freeze temperatures ended November 18 when scientists and engineers at Johnson Space Center in Houston opened thermal vacuum Chamber A's massive 12 meter-wide door.
Webb's optical telescope and integrated science instrument module spent over 90 days enclosed in the chamber, cooled by liquid nitrogen and cold gaseous helium shrouds. The frigid, airless testing environment replicated conditions Webb must withstand in space. Webb's science instruments, including the Canadian NIRISS (Near-InfraRed Imager and Slitless Spectrograph), operate at temperatures of about 40 Kelvin, or minus 233 degrees Celsius.
Having been slowly brought back to ambient temperatures, Webb's science instruments and optics are now destined for Northrop Grumman Aerospace Systems in Redondo Beach, California, where engineers will unite them with the spacecraft element, comprised of the sunshield and the spacecraft bus. Once combined, the entire James Webb Space Telescope will undergo further testing before its expected launch from Kourou, French Guiana, in Spring 2019.
James Webb Space Telescope science themes. (Credit: NASA)
Canadian scientists selected for early look at James Webb Space Telescope data
Seven lucky Canadian astronomers will be among the first to use data from the James Webb Space Telescope, scheduled for launch in the spring of 2019. They will study the effect of massive stars on their environment and of planets in distant solar systems. This initiative falls under the Space Telescope Science Institute Director's Discretionary Early Release Science (DD ERS) program.
Of the 13 proposals accepted from over 100 submissions, three involve seven researchers from across Canada:
Els Peeters (co-Principal Investigator), Western University
Jan Cami, Western University
Bjӧrn Benneke, Université de Montréal
Christian Marois, National Research Council of Canada
Brenda Matthews, National Research Council of Canada
Stan Metchev, Western University
Julien Rameau, Université de Montréal
Their observation projects are expected to occur within the first five months of Webb's science operations.
The chosen teams must now develop tools to do their work, like software that will help the global astronomical community benefit from their investigations.
Webb will include two important Canadian contributions: the high-precision Fine Guidance Sensor (FGS) and the Near-InfraRed Imager and Slitless Spectrograph (NIRISS). NIRISS is one of Webb's four science instruments and will be used in six of the approved DD ERS projects.
The telescope's powerful gaze will allow international research teams to look even deeper into the universe than its predecessor, NASA's Hubble Space Telescope.
Webb is an international collaboration between NASA, the European Space Agency (ESA) and the Canadian Space Agency (CSA).
Credit: NASA/Chris Gunn
James Webb Space Telescope cooling off for the summer
On July 11, the James Webb Space Telescope began a 93-day series of tests in an enormous thermal vacuum chamber at NASA's Johnson Space Center in Houston. The thermal vacuum chamber will be set at a chilling 37 Kelvin or minus 236 degrees Celsius to simulate the extreme conditions in space. These tests will prove that the telescope can withstand those bitter cold temperatures in space.
Once in space, the telescope's highly sensitive instruments will need to be kept extremely cold to be able to detect the infrared light from very faint, distant celestial objects. An huge five-layer sunshield will help protect the observatory from all potential sources of light and heat, like the sun, Earth, and moon and even the heat generated by its own spacecraft.
Canada contributions include Webb's Fine Guidance Sensor (FGS) and one of the telescope's four science instruments: the Near-InfraRed Imager and Slitless Spectrograph (NIRISS).
The FGS is made up of two identical cameras that will act as Webb's eyes. The images they supply will allow the Webb space telescope to determine its position, zero in on celestial targets, and optimize its ability to acquire valuable data.
NIRISS will strive to find the earliest and most distant objects in the Universe's history and help uncover the atmospheric composition of exoplanets.
When the tests in the thermal vacuum chamber are complete, Webb will be shipped to Northrop Grumman, an aerospace and defense technology company, for final assembly and environmental testing with spacecraft and sunshield. Finally, it will be loaded on a boat destined for French Guiana for the launch in October 2018.
Credit: NASA/Chris Gunn
Swarms of distant galaxies and nearby habitable worlds: prime targets for the James Webb Space Telescope's Canadian science team
Using the Canadian-built instrument, the Near-InfraRed Imager and Slitless Spectrograph (NIRISS), Canadian astronomers will study a wide variety of celestial bodies. The astronomers will aim Webb at distant galaxy clusters to study thousands of galaxies, peering back in time into the history of the universe when the very first ones were formed. The astronomers will also explore the atmospheres of a dozen nearby exoplanets (planets beyond our solar system), including several Earth-size that could potentially have conditions favourable for life on their surface.
Canadian astronomers will be allocated observation time on the massive space observatory in return for the Canadian Space Agency's contribution to the Webb telescope. In addition to the NIRISS, the Canadian Space Agency (CSA) is contributing the Webb's Fine Guidance Sensor (FGS). Both were designed, built and tested for the CSA by Honeywell (formerly COM DEV International) in Ontario, with technical contributions from the Université de Montréal, Mont-Mégantic Observatory, the National Research Council Canada and scientific guidance from the FGS science team.
Credit: NASA/Chris Gunn
Credit: Northrop Grumman
Construction of the James Webb Space Telescope is now complete!
On October 31, NASA completed the construction of the James Webb Space Telescope by adding the final layer of the telescope's gigantic sunshield. The sunshield is made of five layers, each as thin as a human hair, that will block out heat from the sun and help keep the telescope's science instruments cool.
Extensive testing has now begun on the telescope to prove that it will work in space. On November 2, NASA conducted the first of several tests of the Webb's giant primary mirror to ensure its integrity and accuracy.
Next, the observatory will be put through tests that simulate the rigours of launch, after which the mirror will be tested again to compare the results and see if there are any changes or damage.