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The Downlink

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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

5...4...3...2...1...1...Happy New Year!

Emily Lakdawalla • December 31, 2005

Read that title aloud. Yes, the last minute of 2005 is actually 61 seconds long.

A fun picture for holiday travel

Emily Lakdawalla • November 22, 2005

A fun NASA explainer just crossed my email inbox and I thought I'd share it.

Another day, another natural disaster on Earth seen from space...

Emily Lakdawalla • September 29, 2005

...but this one is much closer to home than Katrina and Rita were.

A debate about time

Emily Lakdawalla • September 21, 2005

I received a press release in my inbox this morning that made me think. It came from the Royal Astronomical Society, and was titled "RAS Statement on Proposed Abolition of Leap Seconds."

Images from the August 2, 2005 MESSENGER Flyby of Earth

Emily Lakdawalla • August 26, 2005

On August 2, 2005, MESSENGER flew by Earth at an altitude of a mere 2,347 kilometers above Mongolia.

MESSENGER is getting close

Emily Lakdawalla • August 01, 2005

MESSENGER is now returning images as it is bearing down on Earth.

MESSENGER Snaps Earth-Moon Image in Approach to First Flyby

Emily Lakdawalla • June 02, 2005

As MESSENGER began its approach for its August 2 flyby of Earth, its cameras have snapped their first images. The images clearly show a cloudy Earth—and, to scientists' surprise, the Moon as well.

Bill Nye and people
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