Category Archives: Celestial Events

Why Do High Tides Happen Both on the Side of the Earth Facing Toward and Away from the Moon?

Question: During new moon, moon is between earth and sun. The spring tide then occurs. The height of high tide is higher. But on right side of image why is water having high tide. As there is no force pulling … Continue reading

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Do We Observe the Sunrise Six Minutes After it Actually Occurs?

Question: We know sunlight takes about 8 min to reach earth. So we see sunrise 8 min later. Also we see sunrise 2 min earlier due to atmospheric refraction. Does it mean that we see sunrise after about 6 min … Continue reading

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How Can One Tell What Telescope Made an Image of a Deep Space Object?

Question: When looking at an image of a deep space object,  how can you tell what type of telescope was used to take the photo?  — Jeni Answer: Unless the caption or other description of the image lists the telescope … Continue reading

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Why are Telescopes Better at Observing Astronomical Objects than the Naked Eye?

Question: Why are telescopes better than the naked eye?  — Amanda Answer: Well, in fact, there are circumstances when the naked eye is a better way to observe astronomical phenomena than a telescope.  For example, if you are interested in … Continue reading

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Why Are the Best Times to Observe Meteors Between Midnight and Dawn?

Question: Why are all the best times for viewing meteor showers between midnight and dawn?  As I imagine looking down on the solar system from above, I think of a stream of comet debris as impacting all of our outward-facing … Continue reading

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How to Determine the Relevant Date for a Star Chart

Question: How can I find the date from a given star-chart?  — Anand Answer: In the following I am going to assume that you are using a star chart appropriate for the mid-latitudes in the northern hemisphere.  The easiest way … Continue reading

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What Caused the Bright Crater I Now See on the Moon?

Question: Sir Took a picture of the Moon a few days ago and in the lower right hand [corner] a crater was very bright. Was the Moon hit recently?  — Bill Answer: I am not aware of any recent collisions … Continue reading

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Motion of the Stars in the Night Sky

Question: Why do we see the same stars every day of the year in there same location when we orbit?  No way does the Cosmo’s move with us.  — Mike Answer: In fact, the stars that one can see in … Continue reading

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When Does the Earth’s Prime Meridian Line Up With the Celestial Meridian?

Question: On what date and time to the nearest second (in the past) has earths prime meridian directly lined up and faced the “celestial meridian” and I am talking about using the “equatorial coordinate system” Definition for “Celestial Meridian” which … Continue reading

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What Are Those Two Bright Lights on the Western Horizon?

Question: On July 15, 2015, observing from Las Vegas, Nevada, there are 2 objects (Low) in the Western sky. One is bright the other dim. Are they Venus and Jupiter?  — George Answer: Yes!  Venus, the brighter of the two, … Continue reading

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