|Polaris is commonly known as the ____.
|The ____ is an asterism in the Ursa Major constellation.
|____ discovered Jupiter's four largest moons in 1610.
|The ____ cloud is the source of most long-period comets.
|____ has just two small moons (Phobos and Deimos).
|The ____ Space Telescope was launched in 1990.
|William ____ discovered Uranus using a telescope in 1781.
|____ matter doesn't interact with the electromagnetic field.