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

Karzai's Legacy: Missed Opportunities?

Afghanistan's president leaves behind a much different nation than the one he inherited, yet his legacy from 13 years in power is getting mixed reviews More

Video Secret Service Chief Under Fire for White House Security Breach

Julia Pierson faces tough questions from lawmakers after recent intrusion at White House, says: 'It is clear that our security plan was not executed properly' More

Frustrated, Liberian Students Want Ebola Fight Role

Thousands have volunteered to go to counties, rural villages to talk to people in their language about deadly virus More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Malaysia Struggles to Stop People Joining Jihadi
X
Mahi Ramakrishnan
September 30, 2014 2:16 PM
Malaysian authorities say militant groups like the so-called "Islamic State" have used social media to entice at least three dozen Malaysian Muslims to fight in what they call "jihad" in Syria and Iraq. As Mahi Ramkrishnan reports from Kuala Lumpur, counterterrorism police are deeply worried about what could happen when these militants return home.
Video

Video Malaysia Struggles to Stop People Joining Jihad

Malaysian authorities say militant groups like the so-called "Islamic State" have used social media to entice at least three dozen Malaysian Muslims to fight in what they call "jihad" in Syria and Iraq. As Mahi Ramkrishnan reports from Kuala Lumpur, counterterrorism police are deeply worried about what could happen when these militants return home.
Video

Video Could US Have Done More to Stop Rise of Islamic State?

President Obama says airstrikes against Islamic State militants in Syria will likely continue for some time because, in his words, "there is a cancer that has grown for too long." So what if President Obama had acted sooner in Syria to arm more-moderate opponents of both the Islamic State and the Syrian government? VOA State Department Correspondent Scott Stearns reports from the United Nations.
Video

Video Treasure Hunters Seek 'Hidden Treasure' in Central Kenya

Could a cave in a small village in central Kenya be the site of buried treasure? A rumor of riches, left behind by colonialists, has some residents dreaming of wealth, while others see it as a dangerous hoax. VOA's Gabe Joselow has the story.
Video

Video Iran's Rouhani Skeptical on Syria Strikes

Iranian President Hassan Rouhani expressed skepticism Friday that U.S.-led airstrikes in Iraq and Syria could crush Islamic State militants. From New York, VOA’s Margaret Besheer reports the president was also hopeful that questions about Iran’s nuclear program could be resolved soon.
Video

Video US House Speaker: Congress Should Debate Authorization Against IS

As wave after wave of U.S. airstrikes target Islamic State militants, the speaker of the Republican-controlled House of Representatives says he would be willing to call Congress back into session to debate a formal, broad authorization for the use of military force. VOA’s Michael Bowman reports from Washington, where legislators left town 10 days ago for a seven-week recess.
Video

Video Ebola Patients Find No Treatment at Sierra Leone Holding Center

At a holding facility in Makeni, central Sierra Leone, dozens of sick people sit on the floor in an empty university building. They wait in filthy conditions. It's a 16-hour drive by ambulance to Kailahun Ebola treatment center. Adam Bailes was there and reports on what he says are some of the worst situations he has seen since the beginning of this Ebola outbreak. And he says it appears case numbers may already be far worse than authorities acknowledge.
Video

Video Identifying Bodies Found in Texas Border Region

Thousands of immigrants have died after crossing the border from Mexico into remote areas of the southwestern United States in recent years. Local officials in south Texas alone have found hundreds of unidentified bodies and buried them in mass graves in local cemeteries. Now an anthropologist and her students at Baylor University have been exhuming bodies and looking for clues to identify them. VOA’s Greg Flakus has more from Waco, Texas.
Video

Video Ebola Robs Liberians of Chance to Say Good-Bye to Loved Ones

In Liberia, where Ebola has killed more than 1,500 people, authorities have worked hard to convince people to allow specialized burial teams to take away dead bodies. But these safety measures, while necessary, make it hard for people to say good bye to their loved ones. VOA's Anne Look reports on the tragedy from Liberia.
Colonel Steve ‘Spiros’ Pisanos left Greece and came to the U.S. to learn to fly. He flew fighters for the Allies in World War II, narrowly escaping death multiple times.Colonel Steve ‘Spiros’ Pisanos left Greece and came to the U.S. to learn to fly. He flew fighters for the Allies in World War II, narrowly escaping death multiple times.

AppleAndroid