Brahmand NewsPrevious Article
Brahmand NewsNext Article
  • NASA's 'Sun-kissing' Parker spacecraft unlocks solar mystery:-NASA's Parker Solar Probe -- which has flown closer to the Sun than any spacecraft ever -- has beamed back the first observations from its close encounters with the Sun, revealing a "spectacular trove" of data about the solar wind and space weather, the US space agency said....
  • Nearly 24 hr countdown begins for launch of RISAT-2BR1:-The nearly 24 hour countdown began Tuesday for the launch of India's radar imaging earth observation satellite RISAT-2BR1 on board PLSV-C48 from its spaceport of Sriharikota, ISRO said....
  • DefExpo 2020:-DefExpo 2020 themed as "Digital Transformation of Defence" will be held from 5 to 8 February 2020, for the first time at Vrindavan Yojna, Sector 15, Lucknow, Uttar Pradesh....
  • Indo Defence 2020 Expo & Forum :-The Indo Defence Expo 2020 Expo & Forum will be held at Jakarta International Expo Kemayoran, Indonesia, from 4 to 7 November 2020. ...

Planet spotted in Earth's nearest stellar system

Line Spacing+- AFont Size+- Print This Article

Artist's impression of the planet around Alpha Centauri B. An ESO image

PARIS (BNS): A group of European astronomers has for the first time spotted an Earth-like planet in a nearby stellar body lying just 4.3 light-years away from our Solar System.

The new-found exoplanet, with a mass of a little more than that of the Earth, is orbiting a star in the Alpha Centauri system.

The Alpha Centauri is one of the brightest stars in the southern skies and consists of three stars - two stars similar to the Sun orbiting close to each other, designated Alpha Centauri A and B, and a more distant and faint red component known as Proxima Centauri or Alpha Centauri C.

Since the nineteenth century, astronomers have speculated about planets orbiting these bodies - the closest possible abodes for life beyond the Solar System - but searches of increasing precision had revealed nothing.

Astronomers, using the HARPS instrument on the 3.6-metre telescope at European Southern Observatory's La Silla Observatory in Chile, have detected the planet which is orbiting the star Alpha Centauri B in every 3.2 days and is also the lightest exoplanet ever discovered around a star like the Sun.

The new discovery is reported online in the journal Nature on 17 October 2012.

"Our observations extended over more than four years using the HARPS instrument and have revealed a tiny, but real, signal from a planet orbiting Alpha Centauri B every 3.2 days. It's an extraordinary discovery and it has pushed our technique to the limit!," Xavier Dumusque (Geneva Observatory, Switzerland and Centro de Astrofisica da Universidade do Porto, Portugal), lead author of the paper, said.

The Alpha Centauri B is very similar to the Sun but slightly smaller and less bright. The newly discovered planet is orbiting about six million kilometres away from the star, much closer than Mercury is to the Sun in the Solar System.

The orbit of the other bright component of the double star, Alpha Centauri A, keeps the planet hundreds of times further away.

The close proximity of the planet to its host star could make it too hot to harbour life, believe the researchers.

"This is the first planet with a mass similar to Earth ever found around a star like the Sun. Its orbit is very close to its star and it must be much too hot for life as we know it, but it may well be just one planet in a system of several," said Stéphane Udry (Geneva Observatory), a co-author of the paper and member of the team.

"Our other HARPS results, and new findings from Kepler, both show clearly that the majority of low-mass planets are found in such systems," the researcher added.

"This result represents a major step towards the detection of a twin Earth in the immediate vicinity of the Sun. We live in exciting times!" said Xavier Dumusque.


Exoplanet  Earth  Solar System  Sun  ESO  
Line Spacing+- AFont Size+- Print Article

Other Related News

Latest Moon flyby finds no trace of India's Chandrayaan-2 Vikram lander: NASA

NASA has found no evidence of Chandrayaan-2's Vikram lander in the images captured during a latest flyby of its Moon orbiter of the lunar region where India's ambitious mission attempted a soft landing, the US space agency has said.

Upcoming Defence Exhibitions

BRAHMOS Missile Systems


Brahmand World Defence Update 2019

Image Gallery