any of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium)

any of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium)

(astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth

(astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth

(astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth

(astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth

elevation especially above sea level or above the earth's surface

elevation especially above sea level or above the earth's surface

elevation especially above sea level or above the earth's surface

elevation especially above sea level or above the earth's surface