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LST

LST

1 9.9
The time that shows the Earth's rotation relative to the stars
  • symbol
  • Specialized
: hora sideral local
  • Accurate LST readings are essential for aligning telescopes with celestial objects.

Examples

  • Before starting the telescope, the astronomer checked the current LST on the control panel.

  • The observatory calculated LST to determine the best time for viewing distant galaxies.

  • The LST is crucial for astronomers.

  • What is the current LST for this location?

  • The observatory calculated LST to determine the best time for viewing distant galaxies.

  • Before starting the telescope, the astronomer checked the current LST on the control panel.

  • Accurate LST readings are essential for aligning telescopes with celestial objects.

Synonyms

sidereal time
vsLST
  • Specialized
1 9.9

Time kept by the position of stars to track Earth's rotation

is the same system but fixed to one place's longitude for that location

Surface Forms

LST main

Morphology

LST = L + S + T

This is an initialism (acronym) formed from initials; the letters are not English morphemes and the meaning cannot be derived from them.

Etymology

LST stands for Local Sidereal Time; 'sidereal' means 'related to the stars', so this LST is like a clock that follows the stars instead of the sun. That is why astronomers use LST to know which stars are above a place at a certain time.