Marc Rayman at age 14 meets astronomer Peter van de Kamp (center), who had "discovered" planets …

From Earth, a lonely outpost on one of its spiral arms, we’ve begun to peer across the void. It is estimated that at least ten percent of all Sun-like stars have a system of planets, i.e. Watch the Earth transform from a violent, molten rock to a supporter of life. The oldest surviving planetary astronomical text is the Babylonian Venus tablet of Ammisaduqa, a 7th-century BC copy of a list of observations of the motions of the planet Venus, that probably dates as early as the second millennium BC. Ever since the Big Bang, the Universe has been drifting and expanding. There are no confirmed life forms on other planets. Thanks for watching! In 1995, after decades of effort, we found the first such exoplanet (a planet outside our solar system) orbiting a main-sequence star, and today we know that most stars form with planets. Discover how astronomers use collective learning to put our planet in its proper place. We can already make out, dimly, the light from planets orbiting distant stars. The first civilization known to have a functional theory of the planets were the Babylonians, who lived in Mesopotamia in the first and second millennia BC. Planets in the hundreds of billions are likely caught up in the vast whirlpool of the Milky Way galaxy. Why planets are all on the same orbital plane. Instead of making direct images, astronomers have relied on indirect observations and have now succeeded in detecting a multitude of planets around other stars. If Earth-size planets are rare, then the nearest Earth-like planets are farther away and a large, ambitious mission will be required to search for evidence of life on potentially Earth-like planets. Want to help pick the next Astrum Answers? And the stars, along with any planets under their control, are so far away that picking out a faint planet near a distant star is like spotting a mosquito next to a brilliant searchlight miles away. So, there we have it! However, the possibility of life on other planets is very real. Astrophysicists have a new window into the formation of planets. The birth and death of stars leave an aftermath of galaxies, planets, and even living organisms. Given all this evidence, we have to assume that similar processes formed other star systems, and we have just about been able to observe massive planets orbiting other stars along similar planes too. there are 6.25 × 10 18 stars with planets orbiting them in the observable universe. Astronomers have imaged a structure within the disk of material coalescing from the gas and dust cloud surrounding a …