STScI is the data archive center for NASA's Kepler mission, a spacecraft that is undertaking a survey for Earth-size planets in our region of the galaxy. The spacecraft sent its first raw science data to STScI on June 19.
The Institute was the logical choice for storing the anticipated flood of data because its scientists have processed enough observations from NASA's Hubble Space Telescope over the past 19 years to fill almost two collections of material in the U.S. Library of Congress.
The Institute's role is to convert the raw science data into files that can be analyzed by Kepler researchers and to store the files every three months in an archive.
"We are part of this mission because of our experience with Hubble data processing and archiving," explained David Taylor, project manager for the development of Kepler's Data Management Center at the Institute. "NASA's Ames Research Center [the home of Kepler's science operations] had not done a science mission like this one. Building the Data Management Center from scratch would have been more costly, and it would have taken longer to get up to speed."
Launched on March 6 on a Delta II rocket from Cape Canaveral, Fla., the Kepler spacecraft will spend the next 3 1/2 years searching for habitable planets by staring nonstop at more than 100,000 Sun-like stars out of about 4.5 million catalogued stars in the spacecraft's field-of-view, located in the summer constellations Cygnus and Lyra.
The spacecraft simultaneously measures the variations in brightness of the more than 100,000 stars every 30 minutes, searching for periodic dips in a star's brightness that happen when an orbiting planet crosses in front of it and partially blocks the light. These fluctuations are tiny compared with the brightness of the star. For an Earth-size planet transiting a solar-type star, the change in brightness is less than 1/100 of 1 percent. This event is similar to the dimming one might see if a flea were to crawl across a car's headlight viewed from several miles away.
When the mission is completed in several years, the survey should tell astronomers how common Earth-size planets are around stars.
Once a month, the Kepler spacecraft will send its science data, about 50 gigabytes, back to Kepler's Mission Operations Center at the Laboratory for Atmospheric and Space Physics at the University of Colorado. Raw science data will then be relayed to the Institute's Data Management Center (DMC). DMC Operations will convert the information into Flexible Image Transport System (FITS) files, a digital file format used to store, transmit, and manipulate scientific information. FITS is the most commonly used digital file format in astronomy.
The FITS files will be sent to the Kepler Scientific Operations Center (SOC) at Ames Research Center in California, where the science data analysis will be carried out.
Kepler mission scientists will turn the data into 30-minute snapshots of light from each of the 100,000 or more stars. From these snapshots, the scientists will construct a light curve for each star, which details any brightness fluctuations. They will review the light curves to look for any periodic decrease in brightness, an indication of a possible transiting planet.
The mission scientists also will use the light curves to study the stars and their interiors. Because of the quality of the Kepler data and the large number of stars the spacecraft will observe, scientists hope to improve their understanding of stellar evolution.
"The mission's main purpose is to find planets that are the same distance from its solar-type star as Earth is from the Sun," said Daryl Swade, who directed the systems engineering development of Kepler's Data Management Center at the Institute. "So that means that the planet would cross in front of its star every year. We would need three or four of these transits to confirm the detection, which will take about three or four years."
A planet at an Earth-like distance from its star would be in the star's "habitable zone," where temperatures are just right for liquid oceans to exist on the surface without freezing over or evaporating away. On Earth, a liquid ocean was needed to nurture the chemical processes that lead to the appearance of life. This is considered an important prerequisite for life as we know it to appear elsewhere in the galaxy.
Kepler's science data also will be archived at the Institute. Every three months the SOC at Ames will ship FITS files in a 500-gigabyte computer hard drive to the Institute for storage in the Multimission Archive, or MAST. The archive houses data from about 14 missions, including Hubble, the Far Ultraviolet Spectroscopic Explorer (FUSE), and the Galaxy Evolution Explorer (GALEX).
Based on its strong track record in processing and archiving data, the Institute could earn a role in many future missions.
"Partnering with other institutions to share the duties of a mission may be a trend for future missions," Taylor said.
The Space Telescope Science Institute is operated for NASA by the Association of Universities for Research in Astronomy, Inc., Washington, D.C.
Kepler is a NASA Discovery mission. NASA Ames Research Center, Moffett Field, Calif., is the home organization of the science principal investigator and is responsible for the ground system development, mission operations, and science data analysis. NASA Jet Propulsion Laboratory, Pasadena, Calif., managed the Kepler mission development. Ball Aerospace & Technologies Corp. of Boulder, Colo., was responsible for developing the Kepler flight system and is supporting mission operations.For more information about Kepler's Data Management Center at STScI, visit:
A better way to weigh millions of solitary stars
15.12.2017 | Vanderbilt University
A chip for environmental and health monitoring
15.12.2017 | Friedrich-Alexander-Universität Erlangen-Nürnberg
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
15.12.2017 | Power and Electrical Engineering
15.12.2017 | Materials Sciences
15.12.2017 | Life Sciences