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More Issues

Feature: Exoplanets

2 March 2020

Your Guide to Exoplanets

Learn why and how we study exoplanets, and how you can get involved.

2 March 2020

Our Exoplanets Research

Scientists are searching for 100 Earth-like planets around other stars, and you can help.

Swapna Krishna ● 12 March 2020

What is the Habitable Zone?

The habitable zone is the not-too-hot, not-too-cold region around a star where liquid water can exist.

Emily Lakdawalla ● 2 March 2020

The Different Kinds of Exoplanets
You Meet in the Milky Way

Lava worlds. Hot Jupiters. Earth 2.0 candidates. Here's a rundown of some notable exoplanets.

Emily Lakdawalla & Staff ● 2 March 2020

How to Search for Exoplanets

Some methods almost sound like science fiction: Using gravity as a magnifying glass, watching stars wobble at turtle-like speeds, and searching for tiny dips in starlight.

2 March 2020

Your guide to WFIRST

WFIRST, NASA's Wide Field Infrared Survey Telescope, is the next step in our hunt for Earth-sized exoplanets.

Blogs & Articles

Planetary Society Advent Calendar for December 29: Rhea

Emily Lakdawalla • December 29, 2009

Rhea? You might be asking. Rhea? When Saturn has so many more interesting moons? Hear me out.

Planetary Society Advent Calendar for December 27: Prometheus (hot off the presses!)

Emily Lakdawalla • December 27, 2009

This one is fresh from the spacecraft! The data were captured yesterday, December 26, by Cassini during its best yet imaging encounter with the small ringmoon Prometheus, and showed up on the Cassini raw images website today.

Planetary Society Advent Calendar for December 26: Titan

Emily Lakdawalla • December 26, 2009

Titan is a weird alternate-universe Earth, surprisingly similar to our own planet in some ways, but not at all like our planet in others.

Awesome Cassini mutual event movies

Emily Lakdawalla • December 23, 2009

I love posting animations of Cassini images that I compose from frames grabbed from the mission's raw images website, but they are shoddy compared to the versions that eventually come out from the mission's imaging team.

Planetary Society Advent Calendar for December 20: Iapetus

Emily Lakdawalla • December 20, 2009

Iapetus! I'm always interested in Cassini images, but five years ago this month I was refreshing the Cassini raw images website several times a day, eagerly anticipating the mission's first good encounter with Iapetus.

Cassini VIMS sees the long-awaited glint off a Titan lake

Emily Lakdawalla • December 17, 2009

The Cassini mission announced today the first observation of a specular reflection off of a lake on Titan. A specular reflection is a mirror-like flash, and you only get one when you have a mirror-like surface -- very, very smooth.

Planetary Society Advent Calendar for December 16: Mimas

Emily Lakdawalla • December 16, 2009

Mimas is the anti-Enceladus.

Planetary Society Advent Calendar for December 12: Saturn

Emily Lakdawalla • December 12, 2009

Cassini's amazing cameras have set a new standard for the quality, sharpness, resolution, beautiful color, and all-around spectacularness of images returned from the outer solar system.

Planetary Society Advent Calendar for December 9: Atlas

Emily Lakdawalla • December 09, 2009

Here's another weird-looking one, though it's less weird from this particular, polar point of view than it is when viewed from the side.

Planetary Society Advent Calendar for December 5: Epimetheus

Emily Lakdawalla • December 05, 2009

Epimetheus is one of the many small moons of Saturn that are referred to by the Cassini mission team as "rocks" though they are probably mostly made of ice, not rock.

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