Both new planets and stars are being formed. Scientists are actually watching the formation of planets and keeping track of which ones would be able to support life.
Just planets and stars
No. Dwarf planets orbit stars just like planets do. Stars orbit the center of their galaxy. An object orbiting a planet would be a moon.
According to Genesis, God created the lights in the heaven - the sun, moon, stars and planets - on the fourth day, and placed them in the firmament above the earth. However, scientists say that the sun and stars existed long before the earth did. They now know that the earth is just one of the planets that circle the sun, and that these planets were almost certainly formed at the same time.
the stars emitt its own light. But the planets do not have any own light. It absorbs the light from the stars like a sun. It just reflects the light. And also the stars are far away from the earth than the planets. So we can found the twinkling of stars but not the planets.
We expect the Andromeda galaxy to be just like our own Milky Way galaxy. We can see stars (suns) in the Andromeda Galaxy and just as stars have planets orbiting them in our galaxy, we believe that there must be planets also orbiting stars in the Andromeda galaxy.
Yes, recent research has found that a large percentage of stars have planetary systems. It is now believed that planets are a common feature in our galaxy, with some stars possibly hosting multiple planets. The discovery of thousands of exoplanets in the last few decades has increased our understanding of the prevalence of planets in the universe.
Planets orbit stars, stars orbit a galaxy. Planets are not "on" anything. A lot of stars out there have planets - we are just finding out how many now that we have better techniques to find them. So probably all galaxies have at least some stars with planets.
Yes, it is possible for planets to disappear due to being destroyed by a catastrophic event such as a collision with another celestial body, being consumed by a star, or being ejected from a star system. However, planets disappearing on their own without external influence is extremely rare.
No. Astronomy has to do with stars, planets, comets, and everything else that has to do with space. The orbits of planets, constellations, and history of space exploration is also a part of astronomy.
They "shape" the universe into being what it is. (Change any of them and we would no longer exist. Not just us, but the stars and planets would be gone.)
Planets are much closer; stars are just like the sun but much farther away. Planets are rocky or gaseous (or ice) bodies, while stars, like our sun , are giant fusion reactors on steroids. Stars are very hot (millions of degrees) while planets are mainly cool or cold.
Galaxies ARE groups of stars. Lots of stars though. Not just like 2 or 3...