One of the planets that we applied our model to is Kepler 22b, which has a habitable lifetime of 4.3 to 6.1 billion years. Even more surprising is Gliese 581d which has a massive habitable lifetime of between 42.4 to 54.7 billion years.
http://www.latintimes.com/how-long-will-earth-be-habitable-scientists-estimate-planet-can-support-life-175-billion-years
The planet is getting warmer. Reuters. Scientists are predicting that the Earth has 1.75 billion years before it moves out of the habitable zone and towards the sun. According to findings published today in the scientific journal Astrobiology the Earth will at some point move too close to the sun to sustain life.
http://www.latintimes.com/how-long-will-earth-be-habitable-scientists-estimate-planet-can-support-life-175-billion-years
We estimate that Earth will cease to be habitable somewhere between 1.75 and 3.25 billion years from now, Rushby said. Once Earth enters the suns hot zone it will no longer be able to host life causing a massive extinction of all the planet's inhabitants.
http://www.latintimes.com/how-long-will-earth-be-habitable-scientists-estimate-planet-can-support-life-175-billion-years
...a very long time, at least according to the way humans measure time. Based on relative and absolute age dating techniques, geologists now think that the earth was formed about 4,600,000,000 years ago. One of the challenges of any study of the earth is being able to comprehend just how long this is, and for what an extremely small part of it humans have been here.
http://jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry16.html
We had insects 400 million years ago, dinosaurs 300 million years ago and flowering plants 130 million years ago. Anatomically modern humans have only been around for the last 200,000 years-so you can see it takes a really long time for intelligent life to develop.
http://www.uea.ac.uk/about/media-room/press-release-archive/-/asset_publisher/a2jEGMiFHPhv/content/uea-scientists-reveal-earth-s-habitable-lifetime-and-investigate-potential-for-alien-life
Habitable conditions on Earth will be possible for at least another 1.75 billion years-according to astrobiologists at the University of East Anglia.
http://www.uea.ac.uk/about/media-room/press-release-archive/-/asset_publisher/a2jEGMiFHPhv/content/uea-scientists-reveal-earth-s-habitable-lifetime-and-investigate-potential-for-alien-life
The red planet close to Earth and will remain in the habitable zone until the end of the sun's lifetime - 6 million years from now.. The research team was also looking into the possibility that there may be life on distant planets outside our solar system.
http://www.latintimes.com/how-long-will-earth-be-habitable-scientists-estimate-planet-can-support-life-175-billion-years
We compared Earth to eight planets which are currently in their habitable phase, including Mars. We found that planets orbiting smaller mass stars tend to have longer habitable zone lifetimes. One of the planets that we applied our model to is Kepler 22b, which has a habitable lifetime of 4.3 to 6.1 billion years.
http://www.uea.ac.uk/about/media-room/press-release-archive/-/asset_publisher/a2jEGMiFHPhv/content/uea-scientists-reveal-earth-s-habitable-lifetime-and-investigate-potential-for-alien-life
Even more surprising is Gliese 581d which has a massive habitable lifetime of between 42.4 to 54.7 billion years. This planet may be warm and pleasant for 10 times the entire time that our solar system has existed! To date, no true Earth analogue planet has been detected.
http://www.uea.ac.uk/about/media-room/press-release-archive/-/asset_publisher/a2jEGMiFHPhv/content/uea-scientists-reveal-earth-s-habitable-lifetime-and-investigate-potential-for-alien-life
We used stellar evolution models to estimate the end of a planet's habitable lifetime by determining when it will no longer be in the habitable zone. We estimate that Earth will cease to be habitable somewhere between 1.75 and 3.25 billion years from now.
http://www.uea.ac.uk/about/media-room/press-release-archive/-/asset_publisher/a2jEGMiFHPhv/content/uea-scientists-reveal-earth-s-habitable-lifetime-and-investigate-potential-for-alien-life
how long has earth been habitable
The earth has been habitabled with 1.75 and 3.25 billion. The Earth has been habitable between 1.75 and 3.25 billion years long. The earth has been habitable far 1.75 and 3.25 billion.