Astronomers measure a star’s brightness using the apparent magnitude system, where lower values indicate brighter stars.

MOSCOW, December 27. /TASS/. The fate of two crew members of Ursa Major, who were missing during the evacuation following a terrorist attack on the cargo ship in the Mediterranean, is still ...

The Ursa Major had set sail from St. Petersburg, Russia, 12 days before the incident. The vessel was reportedly on its way to Vladivostok in Russia’s Far East, carrying two massive cranes ...

Raytheon and growing propulsion firm Ursa Major on Wednesday announced they have conducted successful missile flight tests with a long-range solid rocket motor for the Army. In a briefing with ...