Tag: Solar System

Some experts believe that we could be just a few years away from discovering the elusive “Planet Nine” — or ruling out the existence of the hypothetical world for good.  DOES PLANET 9 EXIST? But if we do find it, how long would it take for us to send a spacecraft to the far-flung world? And could humans ever make the trip? Planet Nine is the name given to a proposed planet supposedly lurking near the edge of the solar system. If it exists, Planet Nine is likely a dark,…

Deep in the outer reaches of the solar system — so far away from the known planets that the sun would barely be distinguishable from a nearby star — a massive, icy world may be lurking in the shadows, waiting to be discovered by humanity.  And the day that we finally find this elusive planet may be coming soon, thanks to a state-of-the-art telescope that will begin scanning the sky next year. The solar system has eight official planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. But in…

More evidence for a hypothetical extra planet lurking in the most distant reaches of our solar system has come to light — and the clues are associated with icy bodies that cross the orbit of Neptune while traversing  long, looping paths around the sun. Planet Nine, as the predicted planet is referred to, was first postulated in 2016 by Caltech’s Konstantin Batygin and Michael Brown, the latter having also discovered the dwarf planet Eris in 2005. Their original evidence predominantly focused on the clustering of trans-Neptunian objects (TNOs), which are…

Astronomers have long believed that the ice giants Uranus and Neptune are rich in frozen water. However, a new study suggests they may also have tons of methane ice. The findings could help solve a puzzle about how these icy worlds formed. Much about Uranus and Neptune remains unknown. These ice giant worlds have had just a single spacecraft visitor, Voyager 2, which flew past them in the 1980s. As a result, scientists have only a hazy idea of the ice giants’ compositions — for example, that they contain significant…

If you want to build a planet, you’re going to have to get your hands dirty. That’s the lesson from a recent paper, which outlines just how vital giant impacts are to the formation of planets. Astronomers still aren’t exactly sure how planets get their start. Initially, star systems are just clouds of gas and dust swirling around a newborn star. Some of that gas coalesces to form the seeds of planets. Over millions of years, trillions of those seeds merge, becoming ever larger and attracting their neighbors. At a…