ELON Musk has been accused of blocking our view of the stars with his Starlink internet satellites.
The billionaire's firm SpaceX has launched dozens of "broadband" probes into orbit – but has been slammed for filling the sky with "space junk".
The astronomer added: "Rather depressing...this is not cool!"
Back in June, the International Astronomical Union issued a statement complaining about the reflective Starlink satellites.
It argued that the probes could be "detrimental to the sensitive capabilities of large ground-based astronomical telescopes".