Alessondra Springmann ("Sondy") is a NASA FINESST fellowship recipient and a rocket scientist studying asteroids and comets at the University of Arizona's Lunar & Planetary Laboratory in Tucson, Arizona. She investigated thermal properties of meteorite analogues for NASA's OSIRIS-REx asteroid sample return mission, which launched September 8, 2016 to near-Earth asteroid (101955) Bennu.

Sondy studies the inner coma properties of comets with planetary radar and visible-wavelength telescopes. Her past work includes two years of asteroid and comet research with the planetary radar system at Arecibo Observatory, National Astronomy & Ionosphere Center, Arecibo, Puerto Rico; research at the Japanese Aerospace Exploration Agency in Tokyo, Japan; and a master's degree in Earth & Planetary Science from the Massachusetts Institute of Technology.

Alessondra is an award-winning public speaker. She also herds cats and advocates for best practices in inclusive astronomy workplaces.