Download of macorsa 0.7.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The common filename for the program's installer is orsa-0.7.0.tar.gz.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free Mac app is an intellectual property of Pasquale Tricarico. The most popular versions among the program users are 0.7 and 0.6. The program belongs to Education Tools.
From the developer:
ORSA is an interactive tool for scientific grade Celestial Mechanics computations. Asteroids, comets, artificial satellites, Solar and extra-Solar planetary systems can be accurately reproduced, simulated, and analyzed.
You may want to check out more software for Mac, such as UN-SCAN-IT Demo, ScienceMatrix or Enzyme X, which might be related to macorsa.