During just one night – 28 February – they will be joined by Mercury, a rare seven-planet alignment visible in the sky. It is a spectacle that will not be visible again until 2040. But such ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet ... Just Served Us Nine Pizzas" to remember the order of the planets in the solar system: Mercury, Venus ...

It's not too late to see the planet parade. Stargazers will be able to see four or five planets in the night sky with their naked eye this month. A rare seven-planet alignment will reportedly be ...

How does a planet’s size influence its orbit around its parent star? This is what a recent study published in the Proceedings of the National Academy | Space ...

If you've got any interest in skygazing, this is your week. A stunning planet parade is now visible in the night sky. A planet parade is when several of our solar system's planets are visible in ...