Calculate the Julian Date: JD = 2459884.5 (for January 15, 2023, at 00:00 UT)
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The Refraction Correction . Astronomers use a formula based on the tangent of the zenith distance and local weather (pressure and temperature) to "lower" the object back to its true geometric position. 5. Parallax: The Shift in Perspective Calculate the Julian Date: JD = 2459884
, astronomers can rotate coordinate frames to determine exactly where a telescope should point at any given second. 2. Atmospheric Refraction and Parallax Parallax: The Shift in Perspective , astronomers can