Design World

  • Home
  • Technologies
    • 3D CAD
    • Electronics • electrical
    • Fastening & Joining
    • Factory automation
    • Linear Motion
    • Motion Control
    • Test & Measurement
    • Sensors
    • Fluid power
  • Learn
    • Ebooks / Tech Tips
    • Engineering Week
    • Future of Design Engineering
    • MC² Motion Control Classrooms
    • Podcasts
    • Videos
    • Webinars
  • LEAP AWARDS
  • Leadership
    • 2022 Voting
    • 2021 Winners
  • Design Guide Library
  • Resources
    • 3D Cad Models
      • PARTsolutions
      • TraceParts
    • Digital Issues
      • Design World
      • EE World
    • Women in Engineering
  • Supplier Listings

First Earth-size planet is discovered in another star’s habitable zone

By atesmeh | April 18, 2014

Share

A team of astronomers that includes Penn State scientists has discovered the first Earth-size planet orbiting a star in the “habitable zone” — the distance from a star where liquid water might pool on the surface of an orbiting planet. The discovery was made with NASA’s Kepler Space Telescope. The discovery of this Earth-size planet, now named Kepler-186f, confirms — for the first time — that planets the size of Earth exist in the habitable zone of stars other than our Sun.

Some planets previously had been found in the habitable zone, but they all were at least 40 percent larger in size than Earth. “Kepler-186f may be the most similar planet to the Earth yet discovered,” said Penn State Professor of Astronomy and Astrophysics Eric Ford, a coauthor of the paper. “Kepler-186f has a radius just that is just 10 percent larger than that of the Earth and it is located comfortably in the ‘habitable zone,’ meaning that it’s temperature could allow for liquid water to exist on it’s surface.”

Ford also said that there are many things scientists still don’t know about planet Kepler-186f. “We don’t know the mass of this planet but, based on observations of other planets this size, we suspect that Kepler-186f likely has a mass similar to that of Earth. This possibility is intriguing because it means that Kepler-186f may be a rocky planet — one that could provide a habitat for Earth-like life. Future observations are required in order to confirm our expectation that Kepler-186f and other planets slightly larger than Earth are typically rocky,” Ford said.

The planet’s atmosphere is another mystery. “We do not yet know how dense its atmosphere is or what its atmosphere is made of. Thus, we can’t be certain about the surface temperature of Kepler-186f,” Ford said.

Ford also said there are some things that the discovery team already knows are different about the planet Kepler-186f as compared to planet Earth. “Kepler-186f orbits a star that is roughly half the mass of the Sun. That means its star is much cooler than our Sun and that it emits most of its light in infrared radiation, rather than as visible light like our Sun provides. Even if the physical properties of Kepler-186f were exactly the same as those of the Earth, we do not yet know whether life could take root on such a planet and how it might differ from life on Earth.”

The discovery team’s research paper, which will be published by the journal Science on 17 April 2014, also reveals that Kepler-186f orbits its star once every 130-days and receives one-third the energy from its star that Earth gets from the Sun. On the surface of Kepler-186f, the brightness of its star at high noon is only as bright as our Sun appears to us about an hour before sunset. The four companion planets, Kepler-186b, Kepler-186c, Kepler-186d, and Kepler-186e, whiz around their star every four, seven, 13, and 22 days, respectively, making them too hot for life as we know it. These four inner planets all measure less than 1.5 times the size of Earth.

“The discovery of Kepler-186f is a significant step in finding worlds like our planet Earth,” said John Grunsfeld, associate administrator of NASA’s Science Mission Directorate at the agency’s headquarters in Washington. The Kepler Space Telescope, which simultaneously and continuously measured the brightness of more than 150,000 stars, is NASA’s first mission capable of detecting Earth-size planets around stars like our Sun.

Grunsfeld said “Future NASA missions like the James Webb Space Telescope and the Transiting Exoplanet Survey Satellite are poised to determine the composition and atmospheric conditions of distant worlds, continuing humankind’s quest to find truly Earth-like worlds.” Elisa Quintana, research scientist at the SETI Institute at NASA’s Ames Research Center in California and lead author of the paper in the journal Science, said this finding of a habitable-zone planet comparable to Earth in size is “a major step forward. We know of just one planet where life exists — Earth. When we search for life outside our solar system we focus on finding planets with characteristics that mimic those of Earth.”

While this discovery is exciting, Ford said it is only the tip of the iceberg of exciting discoveries to come. “In the coming years, we will continue to discover planets increasingly similar to our Earth. We will find small planets around stars that are brighter and closer to Earth, making them easier to study in more detail. We will measure their masses and densities, so as to understand their composition using next-generation observatories like the Habitable Zone Planet Finder and MINERVA observatories that are being developed by the Center for Exoplanets and Habitable Worlds at Penn State.”

Original release: http://www.eurekalert.org/pub_releases/2014-04/ps-fep041714.php


Filed Under: Aerospace + defense

 

Related Articles Read More >

Ontic acquires Servotek and Westcon product lines from Marsh Bellofram
Flexible rotary shafts support thrust reverser on 150 LEAP 1-A turbofan engines
Drone-mounted inspection breaks barriers for F-35
TriStar, a misunderstood failure of design

DESIGN GUIDE LIBRARY

“motion

Enews Sign Up

Motion Control Classroom

Design World Digital Edition

cover

Browse the most current issue of Design World and back issues in an easy to use high quality format. Clip, share and download with the leading design engineering magazine today.

EDABoard the Forum for Electronics

Top global problem solving EE forum covering Microcontrollers, DSP, Networking, Analog and Digital Design, RF, Power Electronics, PCB Routing and much more

EDABoard: Forum for electronics

Sponsored Content

  • Global supply needs drive increased manufacturing footprint development
  • How to Increase Rotational Capacity for a Retaining Ring
  • Cordis high resolution electronic proportional pressure controls
  • WAGO’s custom designed interface wiring system making industrial applications easier
  • 10 Reasons to Specify Valve Manifolds
  • Case study: How a 3D-printed tool saved thousands of hours and dollars

Design World Podcasts

May 17, 2022
Another view on additive and the aerospace industry
See More >
Engineering Exchange

The Engineering Exchange is a global educational networking community for engineers.

Connect, share, and learn today »

Design World
  • Advertising
  • About us
  • Contact
  • Manage your Design World Subscription
  • Subscribe
  • Design World Digital Network
  • Engineering White Papers
  • LEAP AWARDS

Copyright © 2022 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search Design World

  • Home
  • Technologies
    • 3D CAD
    • Electronics • electrical
    • Fastening & Joining
    • Factory automation
    • Linear Motion
    • Motion Control
    • Test & Measurement
    • Sensors
    • Fluid power
  • Learn
    • Ebooks / Tech Tips
    • Engineering Week
    • Future of Design Engineering
    • MC² Motion Control Classrooms
    • Podcasts
    • Videos
    • Webinars
  • LEAP AWARDS
  • Leadership
    • 2022 Voting
    • 2021 Winners
  • Design Guide Library
  • Resources
    • 3D Cad Models
      • PARTsolutions
      • TraceParts
    • Digital Issues
      • Design World
      • EE World
    • Women in Engineering
  • Supplier Listings