nautički sumrak

The time when the Sun is 12-18 degrees below the horizon. When the Sun moves from 19 to 18 degrees below the horizon, astronomers can begin to detect an increase in the brightness ...

astronomski sumrak

Luft-und Raumfahrt; Raumfahrt

For technical definition, please follow this link to the U.S. Naval Observatory Astronomical Applications website.

građanski sumrak

Luft-und Raumfahrt; Raumfahrt

For technical definition, please follow this link to the U.S. Naval Observatory Astronomical Applications website.

Ceres

Astronomie; Planetenwissenschaft

The largest of the known asteroids; a dwarf planet. Also called 1 Ceres because it was the first asteroid to be discovered (by Piazzi in 1801).

Jarkovski efekat

Astronomie; Planetenwissenschaft

An explanation for the shift in an asteroid's orbit around the Sun due to a thermal thrust caused by the body's uneven heating by sunlight. The illuminated side of an asteroid ...

Viking

Astronomie; Planetenwissenschaft

U. S. Mission to Mars, composed of two spacecraft, launched in 1975. Viking 1 and Viking 2 both consisted of an orbiter and a lander. Primary mission objectives were to obtain ...

sublimacija

Astronomie; Planetenwissenschaft

Phase transformation from solid to gas.

Misija Stardust

Astronomie; Planetenwissenschaft

The fourth in NASA's Discovery program of low-cost spacecraft with highly focused science goals, Stardust was comprised of a spacecraft and capsule that completed a seven-year, ...

Solarna i heliosfericna observatorija

Astronomie; Planetenwissenschaft

A project of international collaboration between ESA and NASA to study the Sun from its deep core to the outer corona and the solar wind. SOHO was launched in December, 1995. SOHO ...