News / Science & Technology

Space Telescope Spots Distant Planets Well Placed for Life

Relative sizes of Kepler habitable zone planets discovered as of April 18, 2013 in this artist's rendition provided by NASA. (L to R) Kepler-22b, Kepler-69c, Kepler-62e, Kepler 62f and Earth.
Relative sizes of Kepler habitable zone planets discovered as of April 18, 2013 in this artist's rendition provided by NASA. (L to R) Kepler-22b, Kepler-69c, Kepler-62e, Kepler 62f and Earth.
Suzanne Presto
Scientists have announced the discovery of three planets, in two planetary systems, that are in or on the edge of the so-called habitable zone, the range that is just the right distance from their stars so they wouldn't be too hot or too cold to have liquid water.

They made these discoveries with NASA's Kepler space telescope.

Kepler-62

William Borucki, the Kepler science principal investigator at NASA's Ames Research Center in California, described the Kepler-62 planetary system, which he says is 1,200 light years away.  One light year is 10 trillion kilometers.

Much like our solar system, he said, Kepler-62 is home to two habitable-zone worlds, called Kepler-62e and Kepler-62f.  Those planets are about one-and-a-half times the size of Earth.

"In fact, these two planets are our best candidates for planets that might be habitable, not just in the habitable zone," he told reporters at a news conference at Ames.  "They're part of a planetary system of five planets that we've discovered so far, but these are the two that are most important."   

Borucki said 62e might be a water world, but scientists aren't certain as they only know its radius, not its mass.  He says planet 62f, the smaller of the two, might very well be a rocky planet, and possibly have polar caps, significant land masses and water.      

Planets 62e and 62f orbit a star about two-thirds the size of our sun and one-fifth as luminous.  Borucki says if you imagined yourself standing on 62f, it would be as bright as a cloudy day on Earth.  

Why Size Matters

These are the smallest exoplanets found in a habitable zone.  

Lisa Kaltenegger of the Max Planck Institute for Astronomy in Heidelberg, Germany, says scientific models indicate that planets about this size could have water.

"The fascinating idea is that maybe we've actually found the first ocean planets, the first water worlds out there, and what it just shows you is the diversity that we're discovering out there," she said.  "And let me say that we only have the radius, so what we infer from the models is very exciting but always has to be taken a little bit with a grain of salt."    

Kepler-69

Thomas Barclay, a Kepler scientist at the Bay Area Environmental Research Institute in California, is most excited about the discovery of a planet in another system -- Kepler 69.  He says Kepler-69c is a planet 70-percent bigger than Earth that orbits a sun-like star, and it's just on the edge of the habitable zone.

"The habitable zone is a region between fire and ice.  Well, this is orbiting closer to the fire than the ice," he said.  "We consider this perhaps to be more of a super-Venus than a super-Earth, perhaps."   

Kepler Space Telescope

The Kepler space telescope explores the structure and diversity of planetary systems.  It finds planets by looking for tiny dips in the brightness of a star that occur when a planet crosses in front of it.  

Kepler was launched in 2009, and it has found more than 100 planets.

You May Like

Analyst: Joint-Arab Military Force Poses Perilous Challenge

Although international forces are desperately needed to counter the threat of the Islamic State group, analysts say conflicting alliances could escalate fighting More

Asia’s Middle Class Changes Demand for Wheat Grain Exporters

Changes in tastes and diets are boon for wheat exporters such as Australia and the United States More

S. African Comedian Taking Over Popular TV Show

Mixed-race comedian Trevor Noah, who is loved for his edgy jibes about race and language, is taking the helm from Jon Stewart at The Daily Show in US More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Film Tells Story of Musicians in Mali Threatened by Jihadistsi
X
Greg Flakus
March 30, 2015 6:48 PM
At this year's annual South by Southwest film and music festival in Austin, Texas, some musicians from Mali were on hand to promote a film about how their lives were upturned by jihadists who destroyed ancient treasures in the city of Timbuktu and prohibited anyone from playing music under threat of death. As VOA’s Greg Flakus reports from Austin, some are afraid to return to their hometowns even though the jihadists are no longer in control there.
Video

Video Film Tells Story of Musicians in Mali Threatened by Jihadists

At this year's annual South by Southwest film and music festival in Austin, Texas, some musicians from Mali were on hand to promote a film about how their lives were upturned by jihadists who destroyed ancient treasures in the city of Timbuktu and prohibited anyone from playing music under threat of death. As VOA’s Greg Flakus reports from Austin, some are afraid to return to their hometowns even though the jihadists are no longer in control there.
Video

Video With Coalition Airstrikes, Iraq Entering 'Last Page' of IS Battle

American warplanes joined Iraq's battle against the so-called 'Islamic State' in northern Iraq late Wednesday, as Iraqi ground troops launched a massive assault on Tikrit. Analysts say the offensive could take the coalition a step further towards Mosul, the largest city held by Islamic State forces. Others say it could also deepen already-dangerous sectarian tensions in the region. VOA's Heather Murdock has more from Cairo.
Video

Video Philippines Wants Tourists Spending Money at New Casinos

Tourism is a multi-billion dollar industry in the Philippines. Close to five million foreign visitors traveled there last year, perhaps lured by the country’s tropical beaches. But Jason Strother reports from Manila that the country hopes to entice more travelers to stay indoors and spend money inside new casinos.
Video

Video Civilian Casualties Push Men to Join Rebels in Ukraine

The continued fighting in eastern Ukraine and the shelling of civilian neighborhoods seem to be pushing more men to join the separatist fighters. Many of the new recruits are residents of Ukraine made bitter by new grievances, as well as old. VOA's Patrick Wells reports.
Video

Video Islamic State Prisoners Talk of Curiosity, God, Regret

Islamic State fighter, a prisoner of Kurdish YPG forces, asked his family asking for forgiveness: "I destroyed myself and I destroyed them along with me." The Syrian youth was one of two detainees who spoke to VOA’s Kurdish Service about the path they chose; their names have been changed and identifying details obscured. VOA's Zana Omer reports.
Video

Video Germanwings Findings Raise Issue of Psychological Testing for Pilots

More is being discovered about the co-pilot in the crash of Germanwings Flight 9525 in the French Alps. Investigators say he was hiding a medical condition, raising questions about the mental qualifications of pilots. VOA's Carolyn Presutti reports.
Video

Video Hi-tech Motorbike Helmet's Goal: Improve Road Safety

In cities with heavily congested traffic, people can get around much faster on a motorcycle than in a car. But a rider who is not sure of his route may have to stop to look at the map or consult a GPS. A Russian start-up company is working to make navigation easier for motorcyclists. Designers at Moscow-based LiveMap are developing a smart helmet with a built-in navigation system, head-mounted display and voice recognition. Zlatica Hoke has more.
Video

Video DOJ: Illinois National Guard Soldier Tried to Join ISIS

U.S. federal law enforcement agents arrested two suburban Chicago men accused of trying to join ISIS overseas, while also plotting attacks in the United States. As VOA’s Kane Farabaugh reports from the Midwest state of Illinois, one of those arrested is a soldier of the Illinois National Guard.
Video

Video New Wheelchair Is Easier to Use, Increases Mobility

Traditional push-rim wheelchairs create a lot of stress for arm, shoulder and neck muscles and joints. A redesigned chair, based on readily available bicycle technology, radically increases mobility while reducing the physical effort. VOA’s George Putic reports.
Video

Video Liberia's Almost Last Ebola Patient Grateful but Still Grieving

Beatrice Yardolo was to make history as Liberia’s last Ebola patient. Liberians recently started counting down 42 days, the period that has to go by without a single new infection until the World Health Organization can declare a country Ebola-free. That countdown stopped on March 20 when there was another new case of Ebola, making Yardolo’s story a reminder that Ebola is far from over. Benno Muchler reports from Monrovia.
Video

Video Cambodian Land Grabs Threaten Traditional Communities

Indigenous communities in Cambodia's Ratanakiri province say the government’s economic land concession policy is taking away their land and traditional way of life, making many fear that their identity will soon be lost. Local authorities, though, have denied this is the case. VOA's Say Mony went to investigate and filed this report, narrated by Colin Lovett.
Video

Video Space Program Status Disappoints 'Last Man on the Moon'

One of the films that drew big crowds last week at the annual South by Southwest festival in Austin, Texas, tells the story of the last human being to stand on the moon, U.S. astronaut Eugene Cernan. It has been 42 years since Cernan returned from the moon and he laments that no one else has gone there since. VOA’s Greg Flakus reports.

VOA Blogs

Circumventing Censorship

An Internet Primer for Healthy Web Habits

As surveillance and censoring technologies advance, so, too, do new tools for your computer or mobile device that help protect your privacy and break through Internet censorship.
More