<h2>TL;DR: No, not always, but most of the time.</h2>
<p>Well, most planets are in either an equatorial orbit (~0° in relation to the star's rotation vector / equator). Some are in polar orbit (~90° and almost perpendicular to the star's equator/rotation vector), and even fewer are in retrograde or strange (highly eccentric or inclined) orbits. For example, all the major planets in our Solar System orbit the Sun in an equatorial orbit. WASP-79b, a hot Jupiter, orbits in a near polar orbit (deviation of 5°). WASP-17b and HAT-P-7b are both in retrograde <strong>and</strong> highly inclined orbits to their parent stars. Neptune's moon, Triton, orbits in an inclined, retrograde  orbit, suggesting that Triton may be a captured body (but that is a long story that is unrelated). This means that <strong>a planet's orbit does not necessarily, have to align with the parent star's rotation vector.</strong></p>

CC BY-SA 4.0
2021-01-22T14:56:24.533Z
2021-01-22T14:56:24.533Z
WarpPrime
<p>For a planet orbiting a star, is it ever possible for a star to be rotating in the opposite way on it's own axis compared to the planet that is orbiting the star?</p>
<p>Or do gravitational forces mean the planet will always orbit a star with the same rotational direction as the star's axis rotation ?</p>

CC BY-SA 4.0
2021-01-22T06:58:52.853Z
Just to be clear - are you asking if there exists retrograde exoplanets? In our solar system, there are none. But outside of our Solar System they exist. See for example WASP-17b. Best.
Rumplestillskin
<orbit><star-systems>
Does a star's rotation always match a planet's orbit?
WDUK
# Does a star's rotation always match a planet's orbit?

(Asked by: username_0 on 2021-01-22)

For a planet orbiting a star, is it ever possible for a star to be rotating in the opposite way on it's own axis compared to the planet that is orbiting the star?

Or do gravitational forces mean the planet will always orbit a star with the same rotational direction as the star's axis rotation ?

**Tags:** orbit, star-systems

> **Comments:**
> **username_1**: Just to be clear - are you asking if there exists retrograde exoplanets? In our solar system, there are none. But outside of our Solar System they exist. See for example WASP-17b. Best.  

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## 1 answers

### Answer by username_2 on 2021-01-22. Score: 4 | Accepted answer

## TL;DR: No, not always, but most of the time.

Well, most planets are in either an equatorial orbit (~0° in relation to the star's rotation vector / equator). Some are in polar orbit (~90° and almost perpendicular to the star's equator/rotation vector), and even fewer are in retrograde or strange (highly eccentric or inclined) orbits. For example, all the major planets in our Solar System orbit the Sun in an equatorial orbit. WASP-79b, a hot Jupiter, orbits in a near polar orbit (deviation of 5°). WASP-17b and HAT-P-7b are both in retrograde **and** highly inclined orbits to their parent stars. Neptune's moon, Triton, orbits in an inclined, retrograde orbit, suggesting that Triton may be a captured body (but that is a long story that is unrelated). This means that **a planet's orbit does not necessarily, have to align with the parent star's rotation vector.**


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