Ravit Helled (Hebrew: רוית הלד) is a planetary scientist and a professor in the department of astrophysics and cosmology at the University of Zürich.

In 2015, she accurately calculated Saturn's rotational period together with Eli Galanti and Yohai Kaspi of the Weizmann Institute of Science.

She continued her doctoral studies at Tel Aviv University, where she completed her PhD work on giant planet formation in 2007.

During her time at the University of California, she studied the influence of planetesimals on the formation of gas giants, and modelled the outer planets in the Solar System.

In the study, computational models are developed to predict the dynamic behaviour of the planet and compare it with existing observations.

In the study, the team is investigating the velocities of the gas giants' internal-rotation and whether the structure can be related to the atmospheric movement of these planets.

[9][10] Together with Yohai Kaspi and Oded Aaronson of the Weizmann Institute of Science, Adam Schumann, and Bill Hubbard of the University of Arizona, Helled succeeded in calculating that the strong winds blowing over Neptune and Uranus are limited to an atmosphere layer whose depth is not more than 1,000 km.