Today, I want to talk about the equatorial coordinate system. Start with this: What if we could project Earth’s coordinates of longitude and latitude into the sky? Latitude wouldn’t be a problem, but ...
Right ascension is based on the apparent rotation of the sky as Earth spins — 360° in 24 hours, or 15° per hour. The concept dates at least from the time of Hipparchus (190-120 b.c.). Right ascension ...
As someone who has spent thousands of hours observing the night sky, I like to think that I’m pretty familiar with it and able to navigate my way around with some ease. That’s certainly true on the ...
Skywatchers are in for a rare celestial treat from June 22 as a major lunar standstill is set to occur. During this phenomenon, known as a major lunar standstill, the moon will rise and set at its ...
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