A car problem allows us to meet Eda Gjergo, a young astrophysicist, who will in turn lead us to meet Margherita Hack, the subject of this episode about women luminaries. Hack was a famous scientist, communicator, and activist.

Eda discovered Margherita Hack on a TV show hosted by Piero Angela. This changed Eda's life. Margherita as a young scientist had a rough time in a profession where men were the important ones and had little regard for women.

Margherita Hack made her mark on the University of Trieste, teaching Astronomy there for almost 30 years and linking it with the Observatory. She had to use some drastic means to be recognized, however, being a woman in a man's world. But the balance changed over time, with her help, to involve many more women than before, both as students and researchers.

Margherita was much more interested in substance and knowledge than in material things, including physical appearance, and this became her brand, in a certain sense. That didn't keep people from loving and respecting her, although there were some occasional incidents, a few of which are recounted by people who knew her.

Perhaps not everyone knows that Margherita Hack as a girl was quite the athlete. Her sport was track and field. She also had a passion for cycling and rode her bike well into her seventies.

Although as an athlete, Margherita did make some compromises she felt she had to during the decades of Italian Fascism, she also took a stand against it, risking expulsion from school.

This segment recounts how Aldo De Rosa and Margherita met in a park in Florence as kids and later married. Aldo supported her in her scientific work throughout their marriage, which lasted over seventy years.

Aldo and Margherita stuck together. He might get bored at her lectures, but he would always be there. They both shared a love for sports and motocycles.

Margherita Hack's talents lay not only in her greatness as a scientist, but also in her remarkable ability to communicate with the general public, and especially young people. She rendered complicated information comprehensible and interesting, using clear and simple examples.

Margherita Hack was a scientist and communicator, but she also expressed her opinions about attualità (current events). Part of this segment features a panel discussion she held with author Andrea Camilleri, best known for his novels about Inspector Montalbano that became a popular TV series.

Margherita Hack spent some time in politics and was also an entrepreneur at times. But she had a lot of fun, too. On the panel with Camilleri, the author of the Montalbano stories, they all come out (in unison) with the famous introduction Montalbano sono (Montalbano, I am). Putting the verb at the end is typical of Sicily, where the story takes place. Otherwise, it would be Sono Montalbano (I'm Montalbano) or, on the phone, "This is Montalbano."

We discover that Margherita Hack was a devoted fan of the long-running TV series, Un posto al sole [a place in the sun]. She explains why. Francesca goes back to Trieste and meets up with Eda who talks about having lived in the same house with Margherita Hack.

In this segment, Margherita talks about her choice not to have children and also discusses her position regarding God. She can't prove he exists nor can she prove he doesn't.

Even though Aldo and Margherita were very different in many ways, they came together in their skepticism. Towards the end of her life, Margherita couldn't move around much, but her brain never stopped going.

Margherita left a legacy of progress, both scientific and social. Perhaps she is still looking down on us, since an asteroid was named after her: 8558 Hack.

Water is a precious resource and is as necessary to life as the air we breathe. Take a tour of some of the most spectacular natural sources of fresh water on the planet.

It's time to learn the names of the planets in Italian. Marika talks about our Solar System. Great for beginners!

The International Space Station has the goal of developing and testing technologies for space exploration that are capable of keeping a crew alive on long-term missions in lunar and Martian orbits. To do this, preliminary work is being done on the Gateway platform: a space station beyond Earth's orbit.

3D printing is going to be a huge factor in conducting the safe exploration of the Moon and Mars. Experiments carried out on the "nearby" Moon will be crucial for later trips to Mars, a much more complicated, long-term enterprise.

Some simple experiments with various materials help us understand what goes into planning the construction of a spacecraft. And then we wonder how we would go about making a planet inhabitable to humans.

The Columbus laboratory is the first permanent European research facility in space. There, astronauts carry out experiments and applications in space science, Earth observation and technology. Columbus offers European scientists full access to a weightless environment that cannot possibly be duplicated on Earth.

What is light? We use it every day, but where does it actually come from? The host suggests doing a little experiment. See if you can follow the instructions in Italian and try it yourself.

Luisella Giulicchi, manager of the European Space Agency ESA, answers questions about light, infrared rays, and lightyears.

Luisella Giulicchi, the system manager for the ESA Copernicus Sentinel six mission, explains what an exoplanet is. Two young researchers do a simple experiment to show us how infrared rays work.