NASA/Marshall Physics and Astronomy 1997 Science Stories
1997 Science Highlights Preview: Physics and Astronomy
Science About Space
NASA/Marshall scientists drew national attention as they explored basic mysteries of the universe and what happens where the Earth meets space.the first visible light image of a cosmic gamma-ray burst detected in February 1997. This was a key piece of evidence needed to answer the 30-year old question "From how far away are the bursts coming?" This, plus follow-up images from NASA's Hubble Space Telescope, indicate that these mysterious bursts, thought for nearly 20 years to be relatively nearby in space, instead come from the most distant parts of the universe, releasing more energy in ten seconds than our Sun will emit in its entire ten-billion-year lifetime. Seven years of continuous observations by NASA/Marshall's Burst and Transient Source Experiment (BATSE) gave astronomers an indication that such tremendous distances were likely to be the explanation for gamma-ray bursts, however these optical counterparts, and subsequent detections in other regions of the spectrum proved to be the smoking gun.
The Wide-field Planetary Camera Image from Hubble of the burst region in the Visual band. The optical source believed to be the home of the gamma-ray burst is at the center of the photograph.
A Close-Up of the Optical Transient taken not long after the burst shows both a point-like source (the bright emission) plus the extended emission (below and to the right) from what may be the distant host-galaxy.
A later Hubble image taken in September reveals that the optical counterpart to the gamma-ray burst is still visible, indicating to astronomers that these objects are indeed from the most distant parts of the Universe.
Scientists are now asking the question "What could cause something like this?," and gamma-ray bursts will take center-stage again on January 7, 1998 at the 191st meeting of the American Astronomical Society Meeting. NASA/Marshall team member Dr. Chryssa Kouveliotou of USRA and Sir Martin Rees, Astronomer Royal of Great Britain, will deliver invited lectures on gamma-ray burst observations and theories. (NASA Administrator Daniel Goldin and Vice President Al Gore are scheduled to speak at separate sessions.)
Learn more about BATSE,
gamma-ray bursts, high-energy astronomy, and recent discoveries!!!
Learn more about black-hole research at NASA/Marshall!!!
|Measuring Spinning Black Holes||March 24, 1997|
|"Superluminal" Jet Sources Close to Home||June 11, 1997|
|Einstein was right...again!!!||November 6, 1997|
Learn more about AXAF and X-ray Astronomy research at NASA/Marshall!!!
|AXAF Mirrors Near Midpoint of Tests||February 5, 1997|
|X-Ray Astronomy at NASA/Marshall|
NASA/Marshall scientists were instrumental in following the eruption of two coronal mass ejections (CMEs) of material from the Sun. Traveling at nearly a million miles per hour, these blobs often wreak havoc with terrestrial communications and power systems. NASA/Marshall's Ultraviolet Imager (UVI) aboard the Polar spacecraft provides unique real-time images of the entire aurora (available on the Internet), and new insights into the response of the Earth's magnetic field and atmosphere to these storms. The frequency and intensity of solar storms is predicted to increase over the next several years as we enter the next solar maximum. Instruments like the UVI, and NASA/Marshall's planned Inner Magnetospheric Imager (IMAGE), will be instrumental in improving our understanding of space weather.
Learn more about the Aurora, the UVI Experiment, and Space Plasma Research at NASA/Marshall!!!
|Here Comes the Sun||April 9, 1997|
|Aurora in the Sky with Diamonds||April 15, 1997|
|Ejected mass from the Sun may spark Aurora on Earth this weekend||November 7, 1997|
|Current UVI Image of the Earth's Aurora!!|
Authors: Dr. John Horack, Dave Dooling
Curator: Bryan Walls
NASA Official: Dr. Gregory S. Wilson, Director
Last updated November 17, 1997