Dr. Nancy Chabot returns to the show to talk about the DART mission, which changed the orbit of an asteroid moon. This was the first demonstration of asteroid deflection technology. She explains how the mission worked, what scientists are discovering, and why a small nudge is all you need when it comes to moving an asteroid out of Earth's way. 

Professor Myriam Telus shares how she studies atmospheres using meteorites. These experiments can teach us about exoplanet atmospheres and planet formation. She says science feels like a playground, with so much to explore. 

International space law expert Cordula Panosch explains what is and is not legal when it comes to deflecting an Earth-bound asteroid. Although much depends on the individual circumstances, she explains how existing laws govern what countries can and cannot do when it comes to outer space.

Dr. Kirby Runyon shares his definition of "planet"-- a round celestial body that was never a star. Using this definition, there are over 150 planets orbiting our sun. He explains why the word planet matters, and why little planets might be the most common planets in our universe.

Professor Lawler discusses why planet nine might not exist.  She explains why reporting not finding something is as important as reporting a discovery. She tells us how satellite internet is getting in the way of astronomical observations. 

Dr. Zibi Turtle is the Principal Investigator of NASA's Dragonfly mission. She tells us what it is like to design and build an octocopter that will roam the surface of Saturn's moon Titan. She also tells us about Titan's exciting chemistry.

Professor Derek Richardson gives us an update on the DART mission, which is headed towards tiny asteroid moon Dimorphos. If all goes well this fall, DART will crash into Dimorphos at four miles per second! This experiment will be a test of asteroid deflection technology.

Dr. Jon Cheng tells us about his fluid flow experiments. These experiments investigate fundamental physics. They can be applied to the movement of the Earth's core as well as things like liquid batteries. Is electro-vortex flow the coolest phrase said on the show yet? Listen and decide! 

Dr. Meredith Rawls talks about the unintended consequences of artificial satellite constellations. Satellites change the night sky, impacting the people and animals that rely on it. Hundreds of thousands of these satellites may be launched, which could create more orbital debris and endanger future space missions. She explains how people are coming together to help fix this problem. 

Prof Jenny Whitten tells us about VERITAS, a NASA mission that will orbit Venus. She explains how scientists will use radar to learn about the surface, and how they picked exactly which radar band to use. She also talks about how VERITAS will shed light on Venus' evolution, the history of water on the planet, and its geologic processes.

Larissa Markwardt talks about Trojan asteroids-- asteroids that orbit the sun a little before or after planets. She describes the special technique she uses to find these asteroids, and why not finding any is an interesting result.