Super-Earth Discovered (Download PDF)

Doorsteptutor material for IAS is prepared by world's top subject experts: Get detailed illustrated notes covering entire syllabus: point-by-point for high retention.

Download PDF of This Page (Size: 168.89 K)

The Harvard-Smithsonian Center for Astrophysics scientists has found a new super-earth like planet. Since the one we found 40 years back which was twice the size of mother earth. It has happened yet again. It has LHS 1140b which is orbiting the habitable zone of a small red dwarf star, LHS 1140, about 39 light-years away. (It’s 4.2 light-years from our sun to the nearest star, Proxima Centauri. ). The MEarth-South telescope in Chile has detected LHS 1140b. As For now observations and educated guesses are being made by the scientist to detect various components in the planet.

Super-Earth discovered

Super-Earth Discovered

Super-Earth discovered

What is LHS-1140b?

  • It is an M dwarf star which is close to the Sun and is a rocky planet
  • LHS refers to Luyten half- second catalogue of stars with proper motions exceeding half a second of arc annually
  • The planet is called as an super earth and in a habitable zone
  • This serve as a good thing for allowing the atmosphere to be studied
  • The mass of LHS 1140b is 6.7 ± 1.8 times Earth’s and its radius is 1.4 ± 0.1 times as large, giving it a density roughly 2.3 ± 0.6 times that of Earth.
  • The orbit is nearly circular which has a radius of 0.09 AU
  • It orbits and transits the sun in every 25 days
  • the planet is almost 5 billion years old and has 15 % of the mass of the sun
  • LHS 1140′s rotational period is 130 days.

What is Harvard-Smithsonian Center for Astrophysics?

  • It is the one of the largest and most diverse astrophysical institutions in the world
  • The scientist do the research in the fields of astronomy, astrophysics, earth and space sciences, and science education.
  • The mission being making advancements in the knowledge and understanding of the universe
  • It is was founded in 1973 with the joint venture of the Smithsonian Institution and Harvard University
  • The current director being Charles R. Alcock.
Directors of Harvard-Smithsonian Center

Directors of Harvard-Smithsonian Center

Directors of Harvard-Smithsonian Center

4 Theories of Origin of Earth - Part 1

The various theories of origin of earth are explained in this lecture, to start with four most ancient theories are explained viz.

7 Theories of Origin of Earth - Part - 2

The various theories of origin of earth are explained in this lecture, contemporary theories are explained viz.

- Published/Last Modified on: April 30, 2017


Developed by: