Science & Technology Current Affairs - 2019

Science & Technology Current Affairs 2019-2020 category comprises current affairs with all important national / international updates in science and tech and events for the year 2019-2020 for UPSC, States, Civil services, SSC and other competitive examinations of India and States.

Category Wise PDF Compilations available at This Link

What is Cosmic Yeti?

Scientists have accidentally discovered ‘the footprints a monstrous galaxy’ being called as ‘Cosmic Yeti’ in early universe that has never been seen before. The discovery provides new insights into the first growing steps of some of biggest galaxies in universe. The astronomical findings were published in Astrophysical Journal.

Why the name?

The scientists have equated the newly found monstrous galaxy to the mythical Yeti as earlier the scientific community generally regarded these galaxies as folklore, given the lack of evidence of their existence, but recently the astronomers in United States and Australia managed to snap a picture of the beast for first time.

Key Findings

Recent studies found that some of the biggest galaxies in young universe matured extremely quickly, this is something that is not yet understood theoretically.

The “cosmic Yeti” galaxy so far might have been concealed by dust clouds and had as many stars as the Milky Way. It was forming new stars at a rate that was over 100 times faster than in Milky Way.

The major puzzle remains that these mature galaxies appear to come out of nowhere as the astronomers never seem to catch them while they are forming. But now the new finding could provide insights into universe’s infancy.

The research team discovered a faint light blob during observations using Atacama Large Millimeter Array (ALMA) and estimated that light from this galaxy has taken 12.5 billion years to reach Earth.

ISRO to launch 14 small satellites

In next 2 months, ISRO will launch 14 small foreign satellites in its next three PSLVs (Polar Satellite Launch Vehicles). The projects are to be implemented by November and December.

Highlights

  • The payloads are to be launched in three PSLV flights namely PSLV-C47, PSLV-C48, PSLV-C49.
  • The Indian payload Cartosat-3 will be the primary payload of PSLV-C47. The Cartosat satellites are a series of Indian earth observatory satellites built and operated by ISRO. The Cartosat-3 is a remote sensing satellite.
  • So far ISRO has launched 300 small satellites to low earth orbits for foreign customers.

Small Satellite

The small satellites weigh around 500 kg. These satellites reduce large economic costs of launch vehicles. They are of lower cost, more frequent, quicker and offer broader access to space. They are primarily used for communication, research, meteorology and insurance.

The small satellites are mini-satellites, micro-satellites and nano-satellites.

ISRO’s Nano-satellites

The INS-ISRO Nano Satellites have capability to carry up to 3 kg. The primary objective of the INS is to provide an opportunity to carry payloads for universities and R&D laboratories. They also provide an opportunity for ISRO technology demonstration payloads.