Ripples in the fabric of reality, distant galaxies acting as lenses, and filaments of galaxies stretching across the cosmos – gravity is more than just the force that keeps us from floating off the surface of Earth. In this final episode of Expedition Sound, we venture out into deep space and explore some of the extraordinary phenomena caused by gravity that we can observe with ESA’s space missions.

Guided by a sonification of a collage of so-called Einstein Rings, we explore how gravity shapes the large-scale structure of the Universe and how ESA’s Euclid space telescope reveals objects that would otherwise remain hidden from view.

Along the way, we learn from Valeria Pettorino, Project Scientist of Euclid, about gravitational lensing, Einstein rings and the cosmic web of galaxies that stretches across the Universe.

In a conversation with Lorenzo Speri, Research Fellow working on ESA's upcoming LISA mission, we learn from each other through a sonification exchange. Lorenzo teaches us about gravitational waves through sound, and together we discuss how sonification can help us understand phenomena that are difficult to observe directly, while opening new doors to experiencing and communicating science.

Hosted by Zsófi Szalavári

Check out the image that the sonification illustrates here: https://www.esa.int/ESA_Multimedia/Images/2025/03/Strong_gravitational_lenses_captured_by_Euclid For the sonification, only 35 of the 112 images were used.

Learn more about ESA’s Euclid mission: esa.int/Euclid

Learn more about ESA’s LISA mission: esa.int/LISA

Citizen Science project ‘Space Warps’: https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_Space_Warps_help_spot_galaxies_bending_spacetime

Many thanks to Klaus Nielsen (DTU Space / Maple Pools) and Parsa Emamdadi for making the sonification in this episode. If you would like to hear more sonifications and music by Klaus, please visit: https://linktr.ee/maplepools

Original theme music produced by Marci Szalavári (https://soundcloud.com/septrone-hd).

Expedition Sound is a podcast series by the European Space Agency (ESA) in which you’re invited to explore the Universe through your ears. Guided by sonifications – the translation of data into sound – we travel from our Sun out into the depths of space to uncover what the space telescopes of ESA’s science missions teach us about the Universe.

Wobbling stars and distant worlds – in this episode of Expedition Sound, we leave the planets of our Solar System behind and venture out into our home galaxy to explore the stars and exoplanets in the Milky Way galaxy. Through the sonification of so-called starquakes observed by the European Space Agency’s Gaia space telescope, we explore what we can learn from listening to the heartbeat of stars and how astronomers uncover clues about their age, structure and life story.

We hear from Sarah Kane, a PhD student at the University of Cambridge, who studies stars using data from ESA's Gaia mission. Sarah shares how starquakes can help astronomers learn about the ages of stars and reflects on her experiences doing astronomical research as a scientist with a visual impairment.

We also meet Maximilian Günther, Project Scientist for ESA's upcoming Plato mission, to explore what we can learn from studying exoplanets and how missions such as Gaia and Plato are helping us piece together the story of worlds so far from our own.

Hosted by Zsófi Szalavári

Check out the sonification by ESA/Gaia/DPAC, Joey Mombarg here: https://www.esa.int/ESA_Multimedia/Videos/2022/06/Gaia_sees_starquakes

Learn more about ESA’s Gaia mission: esa.int/Gaia

Learn more about ESA’s Plato mission: esa.int/Plato

Original theme music produced by Marci Szalavári (https://soundcloud.com/septrone-hd).

Expedition Sound is a podcast series by the European Space Agency (ESA) in which you’re invited to explore the Universe through your ears. Guided by sonifications – the translation of data into sound – we travel from our Sun out into the depths of space to uncover what the space telescopes of ESA’s science missions teach us about the Universe.

We get as close as possible to travelling aboard a spacecraft, experiencing what it would be like to fly towards planet Mercury. Through a sonification of data collected during ESA/JAXA BepiColombo’s sixth flyby, we can almost feel the spacecraft shaking and the rocky planet’s gravity tugging on it.

In this episode of Expedition Sound, we explore the planets of our Solar System and make a stop at planet Mercury. Blasted by the Sun's intense heat and shaped by a magnetic field unlike any other rocky planet’s, this small world is a place that still holds many mysteries.

We hear from BepiColombo Project Scientist Geraint Jones about which of Mercury's mysteries the mission will help scientists unravel, and about what hearing the spacecraft approach the planet is like for someone so involved in the mission. In this episode, we also talk with Ben Ruggles, who was an undergraduate student at the University of Portsmouth, UK, at the time of recording. Ben explains how he uses sonification in his astronomy research as a scientist with a visual impairment, and discusses the challenges of collaborating with others while doing science through sound.

Hosted by Zsófi Szalavári

Check out the sonification by Carmelo Magnafico (IAPS/INAF) here: https://www.esa.int/ESA_Multimedia/Videos/2025/01/The_sounds_of_BepiColombo_s_sixth_flight_past_Mercury

Learn more about the ESA/JAXA BepiColombo mission: esa.int/BepiColombo

Find out more about STRAUSS, the sonification tool that Ben is using for his research: https://www.audiouniverse.org/our-research-and-code/strauss-code

Original theme music produced by Marci Szalavári (https://soundcloud.com/septrone-hd).

Expedition Sound is a podcast series by the European Space Agency (ESA) in which you’re invited to explore the Universe through your ears. Guided by sonifications – the translation of data into sound – we travel from our Sun out into the depths of space to uncover what the space telescopes of ESA’s science missions teach us about the Universe.