# Questions tagged [ecliptic]

Questions regarding the plane containing the orbit of the Earth around the Sun.

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### Is the ecliptic path correct in this sky chart?

I'm making some sky charts using astropy and matplotlib (in Python), and I've just discovered that the ecliptic from the sky charts created by the IAU and Sky&Telescope could be wrong. This is in ...
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### Why is there a discrepancy between the difference in ecliptic longitudes as found with Skyfield when accounting or not accounting for precession?

I'm using Skyfield to calculate some ecliptic longitudes for various dates. I understand that the 0° point of ecliptic longitude changes based on precession due to being the intersection between the ...
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### Why is there a discrepancy between ecliptic longitudes found with Skyfield and Astrolog for old dates?

Just to preface this, I know that Astrolog is software meant for astrology, which is pseudoscientific nonsense; however, I have a friend who insists on using it for certain astronomical calculations (...
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### Moon's ecliptic latitude and longitude [duplicate]

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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### What's the name of the projection onto the celestial sphere of the tropic of cancer?

The projection of earth's equator is the celestial equator. The ecliptic oscillates above and below it in a year, and the furthest north it goes is the projection onto the celestial sphere of the ...
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### Where does the ecliptic cross the horizon during the course of a night?

The Nebra Sky Disc has side-arcs which are interpreted as marking the extent of movement of the sunrise and sunset, during the course of a year. I think they can also be interpreted as marking the ...
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### What objects (if any) are there above or below the ecliptic, or just vaccum/gases

Per the ecliptic Plane of the Solar System. Most of the planets orbit the Sun very nearly in the same plane in which Earth orbits, the ecliptic So, what I am imagining is that there is a imaginary ...
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### Why do most planets remain within a few degrees from the ecliptic?

Why do planets, just like our moon, have their sidereal paths almost the same (with only slight deviation) as that of the ecliptic? Is it mere coincidence? Or is there a better solution? This question ...
1 vote
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### Is this description of ecliptic times correct?

I did a brief write-up as a pet research project to explore astro-geological calculation and visualisation for Muslim prayer times. It's not meant to be authoritative (either scientifically or ...
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### Why is Earth's bow shock wider on one side of the ecliptic than the other?

These diagrams (both confusingly called "Figure 1") of the James Webb Space Telescope's orbit around the L2 Lagrange point show the Earth's bow shock. It makes sense that the bow shock is ...
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### What is the duration of a year on the Moon (Tropical/Sidereal period) for orbit about the Sun ? How/why does length of lunar days vary ? Soltices?

The inclination of the lunar equator to the ecliptic is 1.543°. Synodic period or Length of a day on the moon = 708.7344 hours Moon Fact Sheet 100 Lunar Days - Parts I and II
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### Why does the moon move within the zodiacal circle if its orbit is at an angle to the plane of the ecliptic?

The moon moves along the zodiac circle along with other planets, this is a known fact. But at the same time, its orbit is inclined to the plane of the ecliptic. According to the above diagram, the ...
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### What is the opposite of the vernal point?

The equator and the ecliptic cross at two nodes. One of those nodes is the vernal point. What is the other one called?
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### Why does the Sun track out a seemingly sinusoidal path on the celestial sphere?

The question arose because I wanted to understand the path of the ecliptic after reading about it here: https://johnlucey.webspace.durham.ac.uk/users/solar-year/ Is the sinusoidal path due to Earth’s ...
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### Where and when will someone on Earth be standing with the floor parallel to the Ecliptic plane?

I have been trying to figure this out and I think the answer might be - once per day for anyone living on the Tropic of Cancer or Capricorn. Is that right? To be clear - I want to know where on Earth ...
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### Sun and moon's orbit in ecliptic coordinates using skyfield

I am new to using skyfield, is there any doc or help file that can show me on how to get the orbit of Sun and moon in ecliptic coordinate for a particular date and ...
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1 vote
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### Orbits of planets in ecliptic coordinates

Is it possible to get the ecliptic coordinates of orbits of planets for a specific date and time? Does the ephemeris data of planets help in constructing that? Any help on this would be helpful. I ...
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### Ecliptic line plot in a map

Is there any url that can give me data of ecliptic line that i can plot in a map. i.e i need earth's latitude and earth's longitude of ecliptic line for a specific time and date. Right now i only ...
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### Ecliptic line data [duplicate]

I would like to get the data of ecliptic line with respect to celestial equator for a particular day. Is there any specific URL that can give me this. I only have data for declination of Sun and the ...
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