Question
Here is the question : WHAT HAPPENS WHEN A PLANET LOOPS BACK IN ITS TRAJECTORY ACROSS THE SKY?
Option
Here is the option for the question :
- Scintillation
- Retrograde
- Backstroke
- Apastron
The Answer:
And, the answer for the the question is :
Explanation:
Some planets’ apparent motions across the sky from Earth will occasionally appear to make a U-turn. For years, astronomers were at a loss to explain why Earth appeared to be moving backwards relative to the other planets in our solar system.
The motion of planets across the sky has been a subject of fascination for humans for thousands of years. While most planets move steadily across the sky in a consistent direction, there are times when they appear to loop back on themselves. This phenomenon is known as retrograde motion, and it has puzzled astronomers for centuries.
Retrograde motion occurs when a planet appears to reverse its direction of travel across the sky. Instead of moving steadily in one direction, the planet will slow down, stop, and then begin moving backwards for a period of time before resuming its original direction. This backward motion is an illusion caused by the relative positions of the Earth and the planet in question as they orbit the Sun.
To understand retrograde motion, it’s important to first understand the basic motions of the planets in our solar system. The planets all orbit the Sun in roughly circular paths, with each planet taking a different amount of time to complete one orbit. As the planets orbit the Sun, they also rotate on their own axes, causing them to appear to move across the sky from our perspective on Earth.
From our viewpoint on Earth, the planets appear to move in a consistent direction across the sky, from west to east. This is because we are also moving in our own orbit around the Sun, and our relative motion with the planets causes them to appear to move in a consistent direction. However, there are times when the relative positions of the planets and the Earth cause the planets to appear to move in the opposite direction, or retrograde.
The motion of the planets is governed by the laws of gravity and motion discovered by Sir Isaac Newton. According to these laws, the motion of a planet is determined by its velocity and the gravitational forces acting upon it. As a planet orbits the Sun, it is subject to gravitational forces from not only the Sun, but also from other planets in the solar system.
During retrograde motion, a planet appears to move backwards across the sky because of the relative positions of the Earth and the planet in their respective orbits around the Sun. As the Earth passes by a slower-moving planet, such as Mars, the planet appears to slow down and then move backwards in the sky relative to the fixed stars. This illusion is caused by the fact that we are observing the planet from a moving platform (Earth) that is itself moving in its own orbit around the Sun.
Retrograde motion is not unique to any one planet in the solar system. In fact, all of the planets in our solar system experience retrograde motion at some point in their orbits. The length of time that a planet appears to move in retrograde varies depending on the planet’s distance from the Sun and its position in its own orbit.
retrograde motion is a fascinating phenomenon that has puzzled astronomers for centuries. While it may seem like a strange and inexplicable occurrence, it is actually a natural result of the relative