# Questions tagged [earths-orbit]

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### Earth-Moon Barycenter Perihelion

I am trying to implement an algorithm I created to get the sun rise, transit and set accurately, but in order to do that I need to get the Earth-Moon barycenter (EMB) perihelion, and not the Earth ...
• 173
101 views

### Neptune's eccentricity stability

Will Neptune's orbital eccentricity remain lower than earth's forever? It currently is at around 0.008, compared to Earth's 0.0167.
82 views

### Are all the steps below leading this approximation for a zero-shadow latitude correct?

Here we calculate an approximation of the latitude which experiences zero shadow on (at the start of) a given day of a year. Assumptions: The Earth is spherical Its orbit is circular and the ...
3k views

### Is Jupiter warming the Earth? (Earth, Sun Jupiter system)

If Sun-Jupiter baricentre is outside the Sun, does that mean the Sun is orbiting around that point too right? Then the Sun shouldn't be nearer to the Earth at some point during the Sun-Jupiter orbit (...
• 221
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### What if Earth gained 1 km/s orbital velocity?

How would Earth's orbit be affected if we (hypothetically) added $1 {\rm km/s}$ to its orbital velocity? Would Earth reach close to Mars' orbit? Could Earth get gravitational assist from Mars and go ...
• 81
1 vote
45 views

### What is the period of the 'cycle' of Earth's ecliptic variation, relative to the 'invariable plane'? 70,000 or 100,000 years?

The plane of Earth's path around the Sun, the ecliptic, is different from the average of the solar system's as a whole (the invariable plane) by about 1.57°.... Our path around the Sun, though, goes ...
• 3,333
108 views

### What would happen when the speed of the Sun's spin changes?

Does the Sun's spin have effect on the orbit of the Earth?
• 143
207 views

### The position of Polestar

Despite the revolution of the earth around the sun, why does the Polestar appear to be at the same place all through the year? My daughter, a class 8 student, asked me this question.
1k views

### Can we change Earth's orbit with modern technology? [closed]

It is well known that, according to Newton's 3rd law, spacecrafts entering or leaving Earth provoke tiny (insignificant) changes to Earth's orbit (see related question here). My question is about ...
• 323
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### Keplerian Elements for the Moon and Earth around their Barycenter

So I'm looking to replicate the inner Solar System to a decent degree of accuracy. So far I've been utilizing the Keplerian Elements and Equations for the planets, as shown here. There is one issue ...
• 235
1 vote