A PhD candidate in Germany is helping build instruments for the world's largest telescope while studying the most mysterious objects in the universe: supermassive black holes. Sarah Pappert works at the Max Planck Institute for Extraterrestrial Physics in Garching, near Munich. Her research combines two frontiers: the physics of black holes and the engineering of new telescopes that can see them clearly.
A telescope that will rewrite astronomy
The Extremely Large Telescope, or ELT, is under construction in Chile's Atacama Desert. When finished, its main mirror will span 39 meters, making it the largest optical and infrared telescope ever built. Pappert is part of the team developing instruments for this observatory. These tools must be incredibly precise to capture light from objects billions of light years away. The ELT is expected to start observations later this decade and will allow scientists to study black holes, exoplanets, and the early universe in ways not possible today.
Why black holes matter to everyone
Supermassive black holes sit at the centers of most large galaxies, including our own Milky Way. They contain millions or billions of times the mass of the Sun. Pappert's work focuses on understanding how these giants form, grow, and influence their host galaxies. The data from the ELT will help answer fundamental questions about the universe's structure and evolution. For local communities in Germany, this research represents a point of national pride and a reminder that cutting edge science happens in their own backyard. The Max Planck Institutes are among the world's leading research organizations, and projects like the ELT keep Germany at the center of global astronomy.
Encouraging the next generation of scientists
Beyond her lab work, Pappert is active in science communication. She speaks to schools and public groups about black holes and telescopes. She is especially committed to encouraging girls and young women to pursue careers in STEM fields. In a field where women remain underrepresented, her visibility as a young female researcher matters. She shows that astrophysics is not just for a select few. Her supervisors include Nobel laureate Reinhard Genzel and Frank Eisenhauer, both leaders in black hole research. Their mentorship helps her push the boundaries of what is known.
The ELT will not just see deeper into space. It will also inspire new generations of scientists. Pappert's dual role as researcher and communicator connects the technical work of building a telescope with the human story of curiosity and discovery.
