A new study provides the most accurate estimate of the frequency that planets that are similar to Earth in size and in distance from their host star occur around stars similar to our Sun. A new study ...

Just because Pluto was ruled out as a planet in 2006 doesn’t mean our solar system only has eight planets. The search for Planet Nine is far from over as scientists continue to uncover clues ...

A team of astronomers from Taiwan has uncovered promising evidence suggesting the existence of Planet 9, a hypothesized planet beyond Pluto in the far reaches of our Solar System. This new potential ...

A: Venus, with a mean surface temperature of about 863 degrees Fahrenheit (462 degrees Celsius), is the hottest planet in our solar system, even though Mercury is closer to the Sun. This is because a ...

In the quest for life in the Universe, it makes sense to look at worlds that are similar to the only success story we know of for certain: our planet Earth. Here at home, we inhabit a rocky planet ...