Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

While these planets, excluding Mercury, have been visible at night since January, they'll be harder to see as we inch closer to March. Whenever multiple planets are visible, they always appear as ...

This isn't the first time multiple planets were visible at the same time this year. Mercury, Venus, Mars, Jupiter, and Saturn were displayed in the sky in that order back in June — a rare ...

The different speeds of the planets mean that, on occasion, several of them can be roughly lined up on the same side of the Sun. From Earth, if the orbits line up just right, we can see multiple ...

A planetary alignment, often called a “parade of planets,” occurs when multiple planets appear close together in the sky.

Over the past decade, astronomers have found that many of these stars have multiple rocky planets orbiting them. Enter MAROON-X, an instrument mounted on the Gemini North telescope in Hawaii that ...

As of early 2012, Kepler has uncovered 17 stars with multiple planets as well as a new class of planets that orbit double and even triple stars. But only a handful of the exoplanets discovered so ...

"If we start finding methyl halides on multiple planets, it would suggest that microbial life is common across the universe," Leung said. "That would reshape our understanding of life's ...

If LIFE launches in the 2040s as proposed, it could confirm the presence of these biosignatures in less than a day. “If we start finding methyl halides on multiple planets, it would suggest that ...

Planetary alignments occur when multiple planets gather closely on one side of the Sun, appearing in a near-straight line from Earth's perspective. While some planetary groupings happen every few ...

This alignment occurs when multiple planets appear to line up in the night sky, a phenomenon known as a planetary parade. The visibility and awe of these events depend on how many planets are in ...