<h4><strong>What are the types of planets in our solar system?</strong></h4><p>Our solar system has eight planets. Mercury, Venus, Earth, and Mars are known as terrestrial planets because they have compact, rocky surfaces and a solid core. These planets are the solar system's four innermost planets.</p><p>Jupiter, Saturn, Uranus, and Neptune are known as Jovian (Jupiter-like) planets. These planets are huge compared to Earth and have a gaseous composition similar to Jupiter. So these planets are known as gas giants because they are comprised mainly of gas. However, some or all of them may have minor solid cores.</p><p>These planets formed billions of years ago. Scientists have long studied how planets form in the universe.</p><div class="raw-html-embed"><figure> <iframe width="100%" height="350" src="https://www.youtube.com/embed/IRZYMimUET8?si=zbNtayjA2OxPJacv” title=" formation="" of="" the="" solar="" system"="" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen=""></iframe><figcaption>Video by Peekaboo Kidz/ Youtube.</figcaption></figure></div><h4><strong>How are planets formed?</strong></h4><p>Scientists claim that the dust around a young star is essential in forming celestial objects. The planets of our solar system formed out of the thick donut-shaped disc of gas and dust surrounding our newly-born star, the Sun.</p><p>Although most of the disc’s material fell on the Sun, some dust particles collided with each other (due to the influence of gravity) to form larger objects. Dust clumps first turned into pebbles, and pebbles became larger objects. The presence of gas helped the solid particles to stick together.</p><p>In the colder regions of the disc (too far away from the star), water froze to form ice and mixed with dust. These icy particles clumped together to form massive planetary cores. Due to the cold temperatures, gas molecules could slow down sufficiently to be attracted to the icy-cores of the planets. This is how scientists think gas giants like Jupiter, Saturn, Uranus and Neptune formed.</p><p>Since Uranus and Neptune had smaller cores and their orbits were farthest away from the Sun, they could not attract a lot of gas. This made them smaller and icier than the other gas giants. Thus, these two are also known as ice giants.</p><p>The rocky planets developed in the warmest areas of the disc, closer to the Sun. After the icy giants came into being, not much gas was left for the terrestrial planets to gather. Thus, scientists believe that rocky planets such as Mercury, Venus, Earth, and Mars may have taken millions of years to form after the Sun was born.<br>&nbsp;</p>

The dust surrounding a newborn star is important for planet formation.

How Are Planets Formed?

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How Are Planets Formed?

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