All planets stay on a solid surface but have different annual cycles, so it is worth seeing the planets aligning. The equator of the Sun and the orbital planes of the planets are almost aligned due to their creation from a single rotating gaseous disk. This well-aligned arrangement is not guaranteed for exoplanetary systems (Sanchis-Ojeda et al., 2012). Complex interactions may shift planetary orbits, or stars can be discolored with the protoplanetary disk by disorderly accretion and magnetic interactions adjacent to star torques. Notably, the independent ‘hot Jupiter’s’ are frequently misaligned and sometimes retrograded in space. Transits of planets across starspots, over the Sun-like Kepler, demonstrate that the planets’ orbits are aligned with the galactic equator.
Besides, the orbits remain aligned within a few degrees of each other. The eight main planets of the Solar System will never come into full alignment due to their orbits’ inclination and inclination. The last instance they formed was over 1,000 years ago, in the same region of the sky, and they will not be able to form it again until 6 May 2492. Fortunately, the brightest planets occupy the sky at night once in half a century, giving the appearance of standing in more or less a straight line (Wolf et al., 2007). The last display was in April 2002, as Venus, Mars, Saturn, Jupiter, and Mercury were strung like a planetary necklace over the western horizon, with the crescent moon as their primary gem. NASA utilized a specific alignment of the planets during the 1970s to send space probes with minimal effort on a ‘grand tour’ of Jupiter, Saturn, Uranus, and Neptune.
References List
Sanchis-Ojeda, R., Fabrycky, D.C., Winn, J.N., Barclay, T., Clarke, B.D., Ford, E.B., Fortney, J.J., Geary, J.C., Holman, M.J., Howard, A.W. and Jenkins, J.M., 2012. Alignment of the stellar spin with the orbits of a three-planet system. Nature, 487(7408), pp.449-453.
Wolf, A.S., Laughlin, G., Henry, G.W., Fischer, D.A., Marcy, G., Butler, P. and Vogt, S., 2007. A determination of the spin-orbit alignment of the anomalously dense planet orbiting HD 149026. The Astrophysical Journal, 667(1), p.549.