General Awareness

SCIENCE & TECHNOLOGY - May 2015

May 2015

Oct 02, 2015

Asteroids Moon's Main Water Supply

Using computer simulation, the scientists discovered that a large asteroid can deliver more water to the lunar surface than the cumulative fall of comets over a billion year period.
Water reserves found on the moon are the result of asteroids acting as "delivery vehicles" and not of falling comets as was previously thought, new research has found.
At the beginning of the space age, during the days of the Apollo programme, scientists believed the moon to be completely dry.
However, in the1990s, obtaining data from NASA's Lunar Prospector probe, scientists found signs of the presence of water on the moon.

Oct 01, 2015

First Optical Rectenna

A team of engineers and researchers has demonstrated the world's first optical rectenna, a device that combines the functions of an antenna and a rectifier diode to convert light directly into DC current.
The optical rectennas can provide a new technology for photodetectors that would operate without the need for cooling, energy harvesters that would convert waste heat to electricity and ultimately a new way to efficiently capture solar energy.

Sep 30, 2015

Mid-class Solar Flare

An image of a mid-class solar flare has been captured by NASA’s Solar Dynamics Observatory.
Solar flares are powerful outbursts of electromagnetic radiation from the Sun lasting from minutes to hours.
Researchers have classified this flare as an M7.6 flare.
Solar flares are classified based on their brightness in the X-ray wavelengths.

Sep 29, 2015

Strong Evidence of Water on Mars

NASA has discovered evidence of water flowing on Mars, which raises the possibility of some form of life being discovered on the Red Planet.
Strong evidence for seasonal flows of liquid salty water was detected by NASA's Mars Reconnaissance Orbiter, confirming that this salty water is responsible for seasonal dark streaks seen in spots on the planet's surface.

India Launches its First Space Observatory Astrosat

The Indian Space Research Organisation successfully launched its first space observatory 'Astrosat' into the orbit.
A Polar Satellite Launch Vehicle (PSLV-C30) carrying Astrosat and six other satellites, four identical nano-satellites of Spire Global Inc., the US, a micro-satellite from Indonesia and a nano-satellite of the University of Toronto, blasted off from the first launch pad at the rocket port, around 80 km from Chennai.

Sep 25, 2015

Remnants of Veil Nebula

The Hubble Space Telescope has captured stunning images of remnants of a massive star, the Veil Nebula.
The new set of images reveal the tangled and still expanding remains of the supernova star that exploded 8000 years ago.
The Veil Nebula is one of the best-known supernova remnants.
The entire nebula is 110 light-years across, covering six full moons on the sky as seen from Earth, and resides about 2,100 light-years away in the constellation Cygnus, the Swan.

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