There are a number of online databases which list the properties of exoplanetary systems. One such database is the…
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How Well is the Distance to Gl-581 Known?
Gl-581 is an M3 dwarf star whose distance is derived from its apparent parallactic motion of p = 159.52+-2.27…

Coronagraphic Imaging of Exoplanets
The Starshade project is an adaptation of a technique used on ground-based telescopes called “coronagraphic imaging”, which block-out the…

How to Chart a Path Through the Galaxy Using Extrasolar Planetary Systems
Let’s start by charting a path through our Galaxy using extrasolar planets by checking out the information in the…

How to Convert Exoplanet Transit Depth Measurements from Milli-Magnitudes to Percent
I believe that a measurement in millimagnitudes (mmag) needs to be compared to the un-eclipsed brightness of the host…

Can Two Planets Orbit Each Other So Closely That They Share an Atmosphere?
Let me refer you to the very detailed answers to this question that have been posted to one of…