This New Year's Eve the University of Maryland-led Deep Impact team will again celebrate a holiday in a way that few can match, when their Deep Impact spacecraft "buzzes" the Earth on a flyby that marks the beginning of a more than two-and-a-half-year journey to comet Hartley 2.
In 2005, the Deep Impact team, led by University of Maryland astronomer Michael A'Hearn, celebrated July 4th by smashing a probe into comet Tempel 1 to give the world its first look inside a comet.
The trip to Hartley 2 is one part of a new two-part mission for the team and its Deep Impact spacecraft. During the first six months of the journey, the Extrasolar Planet Observations and Characterization (EPOCh) mission team will use the larger of the two telescopes on the Deep Impact spacecraft to search for Earth-sized planets around five stars selected as likely candidates for such planets. Upon arriving at the comet the Deep Impact eXtended Investigation (DIXI) will conduct an extended flyby of Hartley 2 using all three of the spacecraft's instruments (two telescopes with digital color cameras and an infrared spectrometer. The name for the new combined mission, EPOXI, is a combination of the names of its component missions (EPOCh + DIXI = EPOXI).
The team is using the flyby of Earth to calibrate the spacecrafts instruments for the new mission and to help slingshot it on the way toward Hartley 2. Although the spacecraft will come closest to the Earth on New Year's Eve, the Maryland-led team has already begun its calibration work.
"On Saturday, 29 December, two days before its close flyby of Earth, the Deep Impact flyby spacecraft made observations of the moon to calibrate its instruments for its new mission, EPOXI," said A'Hearn. "Some calibrations are obtainable only on a bright, large source, like the moon when reasonably close to it. It looks as though everything operated just as the science team asked it to operate and you can't ask for anything better than that,â€ he said. "
'This Earth gravity assist provided a unique opportunity for us to calibrate our instruments using the Moon," said Jessica Sunshine, a senior research scientist at the University of Maryland. "In particular, the Moon is very useful because it fills the entire field of view of the infrared spectrometer. The results show that our spacecraft pointing and commanding was spot on. We also made measurements which will allow us to cross-calibrate our instruments with telescopic data and, in the very near future, with a wealth of lunar measurements from new orbiting spacecraft. These data will significantly improve the science from EPOCh observations of Earth and the DIXI flyby of comet Hartley 2, as well as from Deep Impact's prime mission to comet Tempel 1," said Sunshine who is deputy principal investigator on DIXI.
Lee Tune | EurekAlert!
Further Improvement of Qubit Lifetime for Quantum Computers
09.12.2016 | Forschungszentrum Jülich
Electron highway inside crystal
09.12.2016 | Julius-Maximilians-Universität Würzburg
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
09.12.2016 | Life Sciences
09.12.2016 | Ecology, The Environment and Conservation
09.12.2016 | Health and Medicine