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Astronomy

Organizer

 Organizer
First retag.
Awarded 191 times.
Can anyone tell me what is next to the sun?
Awarded Jun 3 at 13:36
Does an infalling observer ever cross the black hole event horizon in finite proper time?
Awarded May 18 at 12:48
How did the ancient cultures determine that the year was actually a fraction of an extra day beyond 365 days?
Awarded Apr 30 at 10:21
Tolerances given for Galactic Directions in answer to 'How fast are we moving relative to the CMB?'
Awarded Apr 4 at 6:50
Do the discs of observed solar systems have random orientations?
Awarded Oct 23, 2023 at 21:20
Why is the Milky Way today about the same diameter as the visible universe was when recombination happened 378000 years after the Big Bang?
Awarded Sep 19, 2023 at 16:21
How did scientists decide the boundary of the Milky Way at Edwin Hubble times?
Awarded Sep 9, 2023 at 8:41
Can the interferometer called "Gravity" measure "a few centimeters on the Moon"?
Awarded Jul 14, 2023 at 0:57
Is the Big Bang a theory or a model?
Awarded May 15, 2023 at 15:41
The energy density of phantom dark energy increases with time. Does it violate the concept of accelerating universe?
Awarded Apr 4, 2023 at 11:51
Does the Earth constantly lose mass?
Awarded Mar 31, 2023 at 0:02
Why there are no terrestrial planets with a subsurface ocean?
Awarded Mar 17, 2023 at 5:41
Can the curvature of a closed universe be measured?
Awarded Feb 15, 2023 at 18:09
What were the two bright dots that showed up near Jupiter and vanished after seconds? [closed]
Awarded Oct 15, 2022 at 18:51
Spectrum features of main sequence and giant stars with the same spectral type
Awarded Sep 24, 2022 at 10:42
Would a nearby "Orphan planet" be detectable?
Awarded Sep 4, 2022 at 18:56
Do the Sun's rays get focused at or near the L1 Lagrangian point?
Awarded Aug 14, 2022 at 0:51
Does magnetosphere have an influence on where meteorites would impact on Earth?
Awarded Aug 12, 2022 at 3:46
Local mean time & Solar Noon
Awarded Jun 11, 2022 at 23:22
How far above the galactic plane would a telescope array need to be in order to image the whole galaxy?
Awarded May 15, 2022 at 14:31
How am I supposed to locate the planets Uranus and Neptune with a 70 mm f/5.7 refractor?
Awarded Apr 14, 2022 at 4:32
Using optical fibers in astronomy
Awarded Apr 11, 2022 at 17:42
What would the night sky have looked like 12.9 billion years ago when galaxies first started to form?
Awarded Apr 3, 2022 at 17:57
Salinity of Martian water 3.5 Billion years ago
Awarded Mar 15, 2022 at 0:34
If a false-vacuum event occurred, would we be able to detect it?
Awarded Mar 14, 2022 at 16:26
If a false-vacuum event occurred, would we be able to detect it?
Awarded Mar 14, 2022 at 16:26
Finding the Laplacian of the deflection potential: I obtain 4𝜅(𝜃⃗ ), not 2𝜅(𝜃⃗ ). Why am I wrong?
Awarded Jan 23, 2022 at 6:20
What is the maximum latitude from which a satellite in a geostationary orbit around Saturn would be visible to an observer on the planet?
Awarded Jan 5, 2022 at 13:40
Will these simple 2 convex lens arrangement telescope see the moon clearly?
Awarded Dec 27, 2021 at 17:05
Did I see Pluto with my naked eye?
Awarded Dec 26, 2021 at 11:11
How was the speed of the Sun (around the Milky Way Galaxy) calculated?
Awarded Nov 17, 2021 at 4:22
If we could fly off edge of observable universe what would happen? [closed]
Awarded Nov 11, 2021 at 22:08
Telescope collimation issue
Awarded Oct 23, 2021 at 9:09
Is there a minimum distance between two black holes in a binary system beneath which it can't be observed as a binary?
Awarded Aug 3, 2021 at 9:25
Gravitational time dilation
Awarded Jun 21, 2021 at 19:26
Do elements like magnesium and sulfur form a layer inside massive stars?
Awarded Jun 19, 2021 at 22:56
Understanding Earth Tilt, Sun's Position and Latitude Calculation
Awarded Jun 3, 2021 at 21:26
If months are based on the moon, then why are the months longer in the Gregorian calendar than lunation?
Awarded May 23, 2021 at 22:41
Why is Starlink polluting the night sky a big concern if we have space telescopes?
Awarded Apr 20, 2021 at 9:58
Calculating the black hole evaporation time
Awarded Apr 16, 2021 at 5:42
Reason for a correlation between Hot Jupiters and higher metallicity in Kepler data
Awarded Apr 6, 2021 at 1:48
What are Thorne-Żytkow objects?
Awarded Mar 4, 2021 at 0:17
How are gravitational lensing and dark matter related?
Awarded Mar 1, 2021 at 9:43
Number of lenslets in wavefront sensor array
Awarded Jan 4, 2021 at 10:41
What is the YORP effect exactly? Is it just the non-central component of the Yarkovsky effect?
Awarded Dec 30, 2020 at 7:26
What makes protoplanetary disks start rotating? (Initial energy needed to rotate)
Awarded Dec 18, 2020 at 3:03
Is there any role today that would justify building a large single dish radio telescope to replace Arecibo?
Awarded Dec 8, 2020 at 13:33
What's the farthest point humans have explored?
Awarded Nov 17, 2020 at 9:43
Kepler and the Sun position
Awarded Oct 6, 2020 at 17:28
Phosphine on Venus?
Awarded Sep 16, 2020 at 7:40
Why does time pass faster in moon than the earth?
Awarded Sep 14, 2020 at 13:15
(post deleted or otherwise unavailable)
Awarded Sep 12, 2020 at 14:43
Why are there no green stars?
Awarded Aug 31, 2020 at 9:17
Problem with making telescope
Awarded Aug 27, 2020 at 10:11
Conventional matter to dark matter ratio, outside of galaxies
Awarded Aug 25, 2020 at 12:31
(post deleted or otherwise unavailable)
Awarded Aug 16, 2020 at 20:27
How is the Hubble constant determined from gravitational waves?
Awarded Jun 2, 2020 at 19:10
Was Guth inflation propelled by what we now call "Dark Energy"?
Awarded May 18, 2020 at 17:55
When we see the Sun, do we actually see its past?
Awarded May 3, 2020 at 18:41
Which of the planets would be detected if they were exoplanets?
Awarded Mar 19, 2020 at 0:35
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