KWIT

Joe Palca

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ROBERT SIEGEL, HOST:

Astronomers are offering the general public a once-in-a-lifetime opportunity: the chance to discover a new planet in our solar system.

Many astronomers now think there may be a massive, undiscovered planet lurking in the far reaches of our solar system. Right now, however, the existence of this planet is theoretical. So the hunt is on to actually capture an image of it.

It's easy to feel overwhelmed by the size of the refugee problem confronting the world today. According to the U.N. Refugee Agency, more than 30,000 people are forced to flee their homes every day because of conflict or persecution.

But one energetic university professor in Germany decided that bemoaning and hand-wringing wasn't solving anything, so she decided to take action.

The scientific community has been roiled by the Trump travel ban.

Like tens of thousands of residents of the seven Muslim-majority countries, scientists have been stranded — cut off from their labs, worried they won't be able to attend upcoming conferences. And even though the ban has been temporarily reversed by a court order, they are uncertain about what the future holds — and the implications for their work.

Consider the case of Ph.D. candidate Hanan Isweiri. She left her lab at Colorado State University to fly home to Libya after the death of her father.

Imagine being able to collect the DNA of a human ancestor who's been dead for tens of thousands of years from the dirt on the floor of a cave. Sounds fantastic, but scientists in Germany think they may be able to do just that. If they're successful, it could open a new door into understanding the extinct relatives of humans.

Two researchers in Germany are trying to determine the best way to teach the German language to nonnative speakers, and at the same time make life a little easier for the wave of Syrian refugees arriving in their city.

Thousands of those refugees have landed in Leipzig, a city of about half a million, in what used to be East Germany. Some of the newcomers have had a difficult time; there have been news reports of racist animosity and violence against them.

On the top of Hawaii's Mauna Kea mountain Thursday, astronomers will point the large Subaru Telescope toward a patch of sky near the constellation of Orion, looking for an extremely faint object moving slowly through space.

If they find what they're looking for, it will be one of the most important astronomical discoveries in more than a century: a new planet in our solar system.

Scientists in Ireland are using a rather unexpected material to make an extremely sensitive pressure detector: Silly Putty.

The Irish researchers combined the kids' plaything with a special form of carbon, and came up with a remarkable new material — one they think could someday be useful in making medical devices.

The next generation of great space telescopes is heading into its final round of ground tests. The nearly $9 billion James Webb Space Telescope will replace the aging Hubble Space Telescope. It's designed to provide unprecedented images of the earliest stars and galaxies that formed in the universe.

But before the telescope can get to work, there are still a lot of engineering challenges to overcome.

Scientists in Michigan have found a new dwarf planet in our solar system.

It's about 330 miles across and some 8.5 billion miles from the sun. It takes 1,100 years to complete one orbit.

But one of the most interesting things about the new object, known for the time being as 2014 UZ224, is the way astronomers found it.

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