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Dr. Lisa Will

Evidence for a Ninth Planet

The six most distant objects in the solar system (magenta) all mysteriously align. Planet Nine, if it had 10 times Earth’s gravity and an anti-aligned orbit to these distant objects (orange), would explain these paths almost perfectly. (Image: Caltech)

By Dr. Lisa Will, Resident Astronomer at the Reuben H. Fleet Science Center

You may have heard that there is evidence of a possible new ninth planet in our solar system, but what exactly does that mean? What evidence was found?

Five Planets Visible in the Morning Sky

Five planets visible in the night sky.

By Dr. Lisa Will, Resident Astronomer of the Reuben H. Fleet Science Center

For the first time in a decade, five planets are visible with the naked eye at the same time. Mercury, Venus, Mars, Jupiter and Saturn will be together in the pre-dawn sky starting Wednesday, January 20, 2016.

Get the News About Comet ISON

A comet streaks through the sky

By Dr. Lisa Will, Fleet Astronomer

Comet ISON is getting brighter in the sky, and it should hopefully become visible to the naked eye soon. If you want to know where to locate it in the sky or learn more about Comet ISON, some useful resources are listed below. 

Plus, the Fleet is hosting a Coffee & Comets event on Tuesday, November 26, early in the morning (because the comet can be viewed before sunrise). Visit our Events page for more information.