A lot of attention has been paid in recent years to the asteroid threat issue. The International Asteroid Patrol has been set up to monitor the flight of potentially dangerous celestial rocks in visual diapason. However, the accuracy of optical methods for determining the trajectory leaves much to be desired. That accounts for inaccuracy of numerous forecasts predicting the date when the space "killer" is to collide with the Earth.
The scientists of the Radio-Astronomical Institute (National Academy of Sciences of Ukraine) have suggested that RT-70 radio-telescope (located in the town of Yevpatoria) should be used to determine and refine the coordinates of selected asteroids. The radio-telescope is equipped with a special guidance system which permits to point the telescope at any spot in the sky. The specificity of RT-70 is its ability to perform two functions: to send radio signals into space and to receive them. There are only two of such universal telescopes in the world.
The Kharkov radio-astronomers have carried out the first radio-location session. The RT-70 telescope antenna radiated radio-frequency pulses in the direction of 1998 WT 24 asteroid, and the echo pulse was synchronously received by Russian and foreign radio-astronomers at several antennas simultaneously. Application of the radio-interferometry method, i.e. coordinated effort of several radio-telescopes located at a distance from each other, allowed to determine the celestial body coordinates at that point with the highest possible precision, and, consequently, to calculate its trajectory. A successful experiment of this type, which took place for the first time in the world, proved that the radio-location method could discover an asteroid, calculate peculiarities of its orbit and surface when it was at a large distance from the Earth.
Valentina Gatash | alfa
MEMS chips get metatlenses
21.02.2018 | American Institute of Physics
International team publishes roadmap to enhance radioresistance for space colonization
21.02.2018 | Biogerontology Research Foundation
Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
22.02.2018 | Business and Finance
22.02.2018 | Health and Medicine
22.02.2018 | Life Sciences