"When the Earth's orbit is more elliptical, the planet spends more time farther away from the sun, and the Earth gets less sunlight over the course of the year.
What would happen if the Earth's orbit was circular instead of elliptical?
If the Earth orbited the Sun in a perfect circle and Earth's axis was straight up-and-down, at a 90° angle to the plane of its orbit the Sun would still rise and set, but it would take the same path across the sky at the same time, every day, throughout the year.
What would happen if Earth had a circular orbit?
A perfectly circular orbit would mean that the earth is always the same distance from the sun. However, the primary cause of our seasons is the tilt of the earth's spin axis with respect to its orbital plane. Eliminating the variation in distance from the sun would not affect this primary attribute.
Is Earth's orbit in the process of getting more elliptical or more circular?
Currently, Earth's eccentricity is very slowly decreasing and is approaching its least elliptic (most circular), in a cycle that spans about 100,000 years. The total change in global annual insolation due to the eccentricity cycle is very small.
What is the disadvantage of highly elliptical orbit?
With two satellites in any orbit, HEOs are able to provide continuous coverage. Their only main disadvantage is that the satellite's position from a point on the Earth does not remain the same and hence requires multiple satellites perfectly timed in the same path for continuous coverage.
Why is the Earth's elliptical orbit not enough to be the reason for seasons?
The Earth has an elliptical orbit around our Sun. This being said, the Earth is at its closest point distance wise to the Sun in January (called the Perihelion) and the furthest in July (the Aphelion). But this distance change is not great enough to cause any substantial difference in our climate.