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Pierre Paquette

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63
How were sundials and moondials possible 800 years ago?
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53
In this image taken by Voyager 1, which is closer: the earth or the moon?
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50
If months are based on the moon, then why are the months longer in the Gregorian calendar than lunation?
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31
Is it at all possible for the sun to revolve around as many barycenters as we have planets in our solar system?
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24
What is that donut-shaped object I see in my telescope?
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20
Is there a precise definition of "Supermoon"?
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20
Could Neptune be viewed with the naked eye from Uranus?
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16
If an exoplanet transit we are seeing is 13000 light years away, are we seeing a 13000-year-old orbit?
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15
How do we know the moon is smaller than Earth?
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15
How can I make the milky way more apparent in my photos?
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14
Realistic description of a sunrise viewed from the asteroid belt?
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13
Could someone explain what is wrong with my telescope, and what should I be able to see with it?
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12
What caused this mysterious stellar occultation on July 10, 2017 from something ~100 km away from 486958 Arrokoth?
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12
Are the Jupiter-Saturn conjunctions and winter solstice related?
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12
Coordinates in the Night Sky
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12
How was the First Point of Aries measured in ancient times?
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9
Do the inner-Earth planets actually align with the constellations we see?
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8
What are the correct positions or alignment of planets in relation to each other and the Sun, is it vertical center, baseline or completely random
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7
Why do zodiac constellations not look like their names?
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7
What safety concerns should an amateur astronomer take?
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7
Can you see something active in the sky apart from satellites? Can there be amateur time-domain astronomy?
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6
When was the last time a great conjunction coincided with a solstice?
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6
What does "TON" in TON 618 stand for?
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5
Can a star emit heat but no visible light?
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5
How can Mercury's sodium tail be imaged?
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5
Is the water underneath Europa's ice cap potable?
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5
Gravity of a gaseous planet without a core
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5
Is this how stars’ right ascensions correlate to planets’ longitudes on a 2d map?
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5
Why doesn't lunar perigee always occur in the same lunar phase?
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5
On Ptolemy climes
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