Observatories on Mauna Kea are back up and running again.

The observatories were forced to temporarily shut down four weeks ago, due to demonstrations against construction of the Thirty Meter Telescope.

According to the University of Hawaii, researchers are already making critical observations and astronomers confirmed a hazardous asteroid they were studying before the TMT shutdown will not be a danger to Earth.

Demonstrators and TMT have come to an agreement to allow employees to use a makeshift road to get up to the summit and return to work.