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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

One-way

Aerospace; Space flight

Communications mode consisting only of downlink received from a spacecraft.

Non-return to zero (NRZ)

Aerospace; Space flight

Modulation scheme in which a phase deviation is held for a period of time in order to represent a data symbol. See Chapter 10.

Nutation

Aerospace; Space flight

A small nodding motion in a rotating body. Earth's nutation has a period of 18.6 years and an amplitude of 9.2 arc seconds.

Non-coherent

Aerospace; Space flight

Communications mode wherein a spacecraft generates its downlink frequency independent of any uplink frequency.

Neptune

Aerospace; Space flight

Eighth planet from the sun, a gas giant or Jovian planet.

Nautical twilight

Aerospace; Space flight

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

Nadir

Aerospace; Space flight

The direction from a spacecraft directly down toward the centre of a planet. Opposite the zenith.

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