Pierre Paquette's user avatar
Pierre Paquette's user avatar
Pierre Paquette's user avatar
Pierre Paquette
  • Member for 3 years, 8 months
  • Last seen this week
63 votes

How were sundials and moondials possible 800 years ago?

53 votes

In this image taken by Voyager 1, which is closer: the earth or the moon?

50 votes

If months are based on the moon, then why are the months longer in the Gregorian calendar than lunation?

31 votes

Is it at all possible for the sun to revolve around as many barycenters as we have planets in our solar system?

30 votes
Accepted

How did the ancient Greeks measure celestial angles?

24 votes
Accepted

What star is this?

24 votes

What is that donut-shaped object I see in my telescope?

20 votes

Is there a precise definition of "Supermoon"?

20 votes
Accepted

Could Neptune be viewed with the naked eye from Uranus?

17 votes

If an exoplanet transit we are seeing is 13000 light years away, are we seeing a 13000-year-old orbit?

15 votes

How do we know the moon is smaller than Earth?

14 votes
Accepted

Realistic description of a sunrise viewed from the asteroid belt?

13 votes
Accepted

Could someone explain what is wrong with my telescope, and what should I be able to see with it?

12 votes
Accepted

Coordinates in the Night Sky

12 votes

What caused this mysterious stellar occultation on July 10, 2017 from something ~100 km away from 486958 Arrokoth?

12 votes
Accepted

Are the Jupiter-Saturn conjunctions and winter solstice related?

12 votes
Accepted

How was the First Point of Aries measured in ancient times?

11 votes
Accepted

Is REDSHIFT one word or two?

9 votes

Do the inner-Earth planets actually align with the constellations we see?

8 votes

Orbital resonance and the precession of the periapsis

8 votes
Accepted

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

7 votes
Accepted

Why do zodiac constellations not look like their names?

7 votes

What safety concerns should an amateur astronomer take?

7 votes

Can you see something active in the sky apart from satellites? Can there be amateur time-domain astronomy?

6 votes
Accepted

What does "TON" in TON 618 stand for?

6 votes

When was the last time a great conjunction coincided with a solstice?

6 votes

Calculating Earth-Sun distance only using trigonometry and terrestrial measurements

5 votes
Accepted

Why doesn't lunar perigee always occur in the same lunar phase?

5 votes
Accepted

How do the phases of Venus prove heliocentrism?

5 votes

How can Mercury's sodium tail be imaged?