Unanswered Questions
1,828 questions with no upvoted or accepted answers
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How does one determine the cardinal direction in which analemma was photographed?
Given an analemma, I am confused by how to obtain any useful information from it. Initially I thought you can at least determine the latitude of photographes, but this is clearly not the case, as it's ...
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Last Thursday's mile-wide asteroid that missed: what angle would it have hit?
Last Thursday, the Planetary Defense Force(!) watched not one, but TWO asteroids miss us again. The same day.
They were each improbable for different reasons: one was closer than the moon, and one was ...
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Why don't they used pulsed masers for planetary mapping instead of radar?
Like at mars and venus. It seems like it would be higher resolution.
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Using prospector for jwst data
I am working with JWST data. I want to estimate the redshift of the sources I have identified with SEXtractor with the help of prospector. Can somebody guide me in this?
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What is the nature of magnetism within and without the Galatic plane?
Does anything happen to our Solar System after we transit the Galactic plane? Is there one polarity "above" (artificially relatively speaking) the plane, and the opposite polarity "...
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Using data from the Fine Guidance System (HST)
Has anyone been able to successfully use data from the Hubble Space Telescope's fine guidance system in order to create light curves?
I found a bunch of older papers that reference this instrument, ...
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Metallicity of Celestial Objects: Why "Metal = Non-metal" Source
This is an existing question with good answers at Metallicity of Celestial Objects: Why "Metal = Non-metal"? , but one thing is missing in the answers: a specific source that states that it ...
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Moon's ecliptic latitude and longitude
Is there a way to compute the Moon's ecliptic latitude and longitude without declination or right ascension?
Note: I have a formula to compute the Moon's position that uses an ecliptic latitude and ...
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How to find the minimum range at which some imaging payload/instrument can produce a clear image?
JWST's NIRCam can image deep sky objects so clearly. However if we notice the images of planets like Mars, Saturn or Saturn's's Moon-Titan, they don't appear to be much clear. Hence considering the ...
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Dual mode in SExtractor
I wanted to use SExtractor for source detection. I have 7 NIRCam filter data from the JWST CEERS catalogue. How can i proceed with the source detection. I read about using dual image mode in which a ...
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Light flashes in night sky with a ~14 second period?
Last Sunday (23rd of June) I observed flashes of light during a field trip in the night sky with a period of approximately 14 seconds. I timed the interval between flashes with a stopwatch a few times,...
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What would Uranus look like from light years away?
It has been suggested that at least some of the "super-puff" planets may actually be ordinary planets with rings. Saturn, for instance, may appear as a "super-puff" to an alien ...
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What is called following two metric's signature if they are not Lorentz signatures?
I make two different substitutions (m(r)=m1(r), m2(r)) to the modified Schwarzschild metrics:
$${\it m1} \left( r \right) =1/2\,r{c}^{2} \left( 1+\sqrt {{\frac {r{c}^
{2}-2\,MG}{r{c}^{2}}}} \right) {G}...
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Help me figure out how to solve the gravitational lens equations
I want to simulate gravitational lensing. In the article LENSINGGW: a PYTHON package for lensing of gravitational waves there is this fragment [page 3]:
My research: As far as I understand, this is a ...
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Do jets from gamma ray bursters and quasars cause gas clouds to collapse just as supernovae are postulated to do?
A supernova may have caused a gas cloud to collapse and form our solar system .But can jets from quasars and gamma ray bursters also cause gas clouds to collapse ?
CommunityBot
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