Kepler discovers "Earth's bigger, older cousin"

Kepler discovers "Earth's bigger, older cousin"

July 24, 2015

According to NASA, planet Kepler-425b is remarkable because it combines a number of factors that make it the most likely candidate for habitability found outside the Solar System so far. It's not only roughly Earth-sized, but it also orbits in the habitable zone of a sun-like star.

To date, the Kepler mission has confirmed the existence of 1,030 exoplanets, but so far the search for a planet similar enough to Earth to support life has been an exercise in extremely rough approximations. The technique used by the unmanned Kepler space telescope (launched in 2009) to detect exoplanets relies on measuring the dip in a star's light as a planet passes in front of it. This tends to favor finding large planets orbiting very close to their stars, which means that the easiest ones to find have been very hot super-Jupiters.

Another problem is that even if a small rocky planet like Earth is found, it has to be in its star's habitable zone. That is, its distance from its star is such that the possible surface temperature could allow liquid to exist, so it can't be too close or too far away. However, one particular sticking point until today is the kind of star these planets revolve around. The most common type of stars in our galaxy are red dwarfs, which are K or M types. Since they're so numerous, it's no surprise that most exoplanets are found orbiting them, but these are small, old, and cold stars, which poses many problems for the habitability of their planets.

Earth, on the other hand, orbits a young, medium-sized G2 star, which is relatively warm and stable with a lifespan long enough for life to establish itself. Since so little is known about other star systems, and ours is the only one known to have life, scientists tend to favor sun-like stars as the best candidates for habitable planets.


LET’S START A NEW PROJECT TOGETHER!



September 12, 2018

Dynamic SEO is a secret weapon for your search engine success.

September 06, 2018

Enterprise e-commerce environments have to deal with large volumes of website visitors in addition to the sale and new season launches, which has a large number of traffic and website clicks.

Load More Load More

Share the story with your friends!

Softimpact. All Rights Reserved © 2018

GET IN TOUCH

SITEMAP

© 2018, Softimpact. All Rights Reserved

COME FOR A CHAT
COFFEE ON US...

ADDRESS
Aamal Center, 6th floor,
Barbar Abou Jaoude Street
Jdeideh Highway, Lebanon

Contact

Contact Phone Tel + 961 1 890888
Fax + 961 1 890888

FOLLOW US ON