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Sedumjoy
  • Member for 6 years, 11 months
  • Last seen more than a week ago
0 votes
1 answer
14k views

Is it safe to view a solar eclipse with the naked eye during totality?

0 votes
0 answers
153 views

Do solar eclipse paper glasses need to list both the ISO and CE stamp to be compliant or is the ISO sufficient?

19 votes
1 answer
21k views

How do I know it is safe to remove eclipse glasses when viewing a total solar eclipse?

8 votes
6 answers
4k views

At what velocity would an object have to fall in order to become weightless? [closed]

10 votes
4 answers
9k views

During a total solar eclipse is it possible to see solar flares with the naked eye?

4 votes
1 answer
405 views

Why is the Department of Defense so sure CNEOS 2014 is from outside the solar system?

2 votes
1 answer
90 views

Is there a way to compare input and output energy of solar fusion to the input and output energy of man made fusion?

1 vote
2 answers
442 views

Does space expand?

10 votes
3 answers
2k views

How far apart has the sun drifted from Alpha Centari due to the expansion of the universe since its formation?

21 votes
2 answers
6k views

Why is Venus's atmospheric pressure 75 times that of earth when carbon dioxide is only 1.5 times heavier than air?

2 votes
1 answer
63 views

Do M dwarf stars emit the wavelengths of the electromagnetic spectrum necessary for photosynthesis?

5 votes
1 answer
209 views

What is the distance of the closeset galaxy outside our local group and what is its name?

20 votes
3 answers
4k views

Is the power output at the core of the sun about the same as a compost pile (about 300 watts)?