The night sky is about to light up with rare planetary alignment
A great alignment of all of Earth's planetary neighbors will soon take place in the night sky in a rare celestial show. The term "planetary alignment" is used to describe when several planets gather in a small area in the sky simultaneously,
Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...
Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...
A new study examines how much material from the closest star system to Earth will end up in orbit around the Sun, and how ...
Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.
Neptune and Saturn — all aligned. These events are often called a planetary alignment, but planets always appear in a line in the sky because they orbit the sun — the difference is that they ...
The planet Neptune wobbled in its orbit around the Sun. That could only mean one thing, astronomers said: There was a ninth planet out there, somewhere, lurking in the fringes of the solar system.
Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.
Mercury, being the closest to the sun, completes an orbit in only 88 days, compared with Earth’s 365-day year. In stark contrast, Neptune, the farthest planet from the sun, takes a staggering ...
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