Planets not visible to the naked eye can be seen using telescopes. These instruments magnify distant objects, allowing us to observe planets that are too faint or distant to be seen without optical assistance.
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The Moon is much smaller than Earth. It has a diameter of about 3,474 kilometers, compared to Earth’s diameter of about 12,742 kilometers. This makes the Moon roughly one-fourth the size of Earth.
Planets and stars can be distinguished by their appearance. Planets usually shine with a steady light and move against the background of fixed stars. Stars twinkle due to atmospheric disturbances, while planets do not.
Halley’s Comet is a famous periodic comet that orbits the Sun every 76 years. Named after astronomer Edmond Halley, it becomes visible from Earth during its closest approach and is known for its bright and spectacular appearance.
Beyond the Solar System lies the vast expanse of interstellar space, filled with stars, star systems, and other celestial objects. The closest neighboring star system is Alpha Centauri, and the region includes the Oort Cloud and various exoplanets.