User Chappo Hasn't Forgotten - Astronomy Stack Exchange

19 votes

Accepted

Always orient a sundial towards polar north?

answered Jul 18 at 5:28

9 votes

Why won't the Sun set for days at N66.2 which is below the arctic circle?

answered Mar 22, 2021 at 23:50

6 votes

How do we know distant stars still exist

answered Jan 31, 2019 at 7:44

6 votes

Brightest star visible from Italy and Argentina

answered Apr 6, 2018 at 1:53

5 votes

Accepted

What suggests the cyclic nature of the universe? Proposed by Stephen Hawking

answered Sep 4, 2016 at 1:51

5 votes

Accepted

What are the RAs of the boundaries between traditional zodiacal signs?

answered Aug 28, 2018 at 1:56

5 votes

Which Chandrasekhar Limit do I use? 1.39 or 1.44?

answered Oct 24, 2018 at 7:48

5 votes

Lunar phases if Earth was tidally locked to the Moon

answered Feb 10, 2019 at 2:47

5 votes

Expansion and Gravity

answered Dec 19, 2018 at 4:00

5 votes

Is there a far away probe that has recorded the light spectrum from Earth as if it were an exoplanet?

answered Apr 16, 2019 at 23:43

4 votes

Accepted

Is it plausible for a planet that is positioned in the habitable area of a solar system to have little extractable metals?

answered May 21, 2019 at 6:48

4 votes

Accepted

Can the range of the observable universe be extended through an intermediary?

answered Apr 14, 2019 at 22:58

4 votes

Accepted

Life on other planets

answered Nov 22, 2018 at 0:31

4 votes

Is Venus visible throughout the night?

answered Mar 12, 2018 at 4:10

3 votes

Why do neutron stars collide instead of just revolving around each other like planets revolve around the Sun?

answered May 30, 2018 at 4:07

3 votes

Influences from outside the observable universe explaining dark energy and expansion?

answered Jul 5, 2018 at 8:00

3 votes

Whats the probability of a hazardous impact for human life on Mars?

answered Jul 7, 2018 at 2:03

3 votes

How does science knows what is the early universe?

answered Jan 16, 2019 at 10:20

2 votes

Accepted

Seasonal effect based on Earth position

answered May 1, 2019 at 1:46

2 votes

Is there any habitable exoplanet close to Earth?

answered Mar 9, 2018 at 1:49

2 votes

Theoretically what happens to a black hole that evaporates?

answered Apr 5, 2018 at 8:36

2 votes

Synodic period of planets

answered Oct 29, 2018 at 11:26

2 votes

Accepted

What happens when a star gets hit by a supernova?

answered Sep 11, 2018 at 0:27

1 vote

Where can I find source data for the graph of metric expansion over time, as shown in this ESA web page?

answered Jun 8, 2018 at 13:27

1 vote

Can aliens possibly be around us?

answered Jun 11, 2018 at 1:36

1 vote

If a black hole has a mass of a universe what will be the volume of it?

answered Mar 24, 2018 at 5:06

0 votes

Can space-time expansion destroy light?

answered Oct 24, 2017 at 20:49

0 votes

How could time only have started with the Big Bang?

answered Sep 23, 2019 at 8:26

0 votes

Did I see a supernova explosion?

answered Sep 15, 2020 at 1:10

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29 Answers

Always orient a sundial towards polar north?

Why won't the Sun set for days at N66.2 which is below the arctic circle?

How do we know distant stars still exist

Brightest star visible from Italy and Argentina

What suggests the cyclic nature of the universe? Proposed by Stephen Hawking

What are the RAs of the boundaries between traditional zodiacal signs?

Which Chandrasekhar Limit do I use? 1.39 or 1.44?

Lunar phases if Earth was tidally locked to the Moon

Expansion and Gravity

Is there a far away probe that has recorded the light spectrum from Earth as if it were an exoplanet?

Is it plausible for a planet that is positioned in the habitable area of a solar system to have little extractable metals?

Can the range of the observable universe be extended through an intermediary?

Life on other planets

Is Venus visible throughout the night?

Why do neutron stars collide instead of just revolving around each other like planets revolve around the Sun?

Influences from outside the observable universe explaining dark energy and expansion?

Whats the probability of a hazardous impact for human life on Mars?

How does science knows what is the early universe?

Seasonal effect based on Earth position

Is there any habitable exoplanet close to Earth?

Theoretically what happens to a black hole that evaporates?

Synodic period of planets

What happens when a star gets hit by a supernova?

Where can I find source data for the graph of metric expansion over time, as shown in this ESA web page?

Can aliens possibly be around us?

If a black hole has a mass of a universe what will be the volume of it?

Can space-time expansion destroy light?

How could time only have started with the Big Bang?

Did I see a supernova explosion?