Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Tonight starts a great week of star gazing. Here's when to watch the full moon next to Venus, and a rare planetary parade ...

February has already proven to be a snowy month for Oregon, making the name of the upcoming full moon quite fitting. Here's ...

Here's when and how to watch the next full moon and February's rare planetary parade across Pennsylvania skies, starting with ...

This February brings a rare planetary alignment that will gather five bright planets into clear view — Venus, Jupiter, Mars, Mercury, and Saturn. The next similar alignment is expected to occur ...

(01:28) Ask Smithsonian: Why Does My Nose Run When It’s Cold Outside? (01:02) Ask Smithsonian: Why Do We Kiss? (01:12) ...

To better understand why the planets have variable compositions, we have to first understand the process of how stars form. While the composition of gas and dust in a precursor molecular cloud is ...

Why did Earth’s first radio message ... If the team did nothing, Kepler would still detect relatively large planets but would miss the smallest ones. If the scientists went ahead with adjusting ...

But, later in the month, you have the chance to see the planets joined by Mercury, creating an uncommon seven-planet alignment, which will not be seen again until 2040. Here is what you need to ...

Mars is one of the most explored planets in our solar system. Over the years we have had robots roaming on the surface and NASA is working hard to land humans on the planet by the 2030s ...