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Space flight

Of or relating to the act of voyaging outside the Earth's atmosphere and into outer space, and the science involved in achieving it.

Contributors in Space flight

Space flight

International celestial reference system (ICRS)

Aerospace; Space flight

Conceptual basis for celestial positions, aligned with respect to extremely distant objects and utilising the theory of general relativity. Link.

International celestial reference frame (ICRF)

Aerospace; Space flight

The realisation of the ICRS provided by the adopted positions of extragalactic objects.

Hour angle

Aerospace; Space flight

The angular distance of a celestial object measured westward along the celestial equator from the zenith crossing. In effect, HA represents the RA for a particular location and time of day.

Galilean satellites

Aerospace; Space flight

The four large satellites of Jupiter so named because Galileo discovered them when he turned his telescope toward Jupiter: Io, Europa, Ganymede, and Callisto.

Gal

Aerospace; Space flight

Unit of gravity field measurement corresponding to a gravitational acceleration of 1 cm/sec2.

Gramme (g)

Aerospace; Space flight

A thousandth of the metric standard unit of mass (see kg). The gramme was originally based upon the weight of a cubic centimetre of water, which still approximates the current value.

Acceleration due to a body's gravity (g)

Aerospace; Space flight

Constant at any given place, the value of g varies from object to object (e.g. Planets), and also with the distance from the centre of the object. The relationship between the two constants is: g = ...

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