By the numbers Dwarf planet

01/05/05: Date Eris, the largest known dwarf planet in our solar system, was discovered

2,400: Eris’ diameter in kilometers

48: Diameter in inches of telescope used to find it

560: Years it takes Eris to orbit the sun

Minus 405: Estimated surface temperature on Eris in degrees Fahrenheit

Sources: www.gps.caltech.edu; www.wikpedia.org

Invalid username/password.

Success. Please wait for the page to reload. If the page does not reload within 5 seconds, please refresh the page.

Enter your email and password to access comments.

Hi, to comment on stories you must . This profile is in addition to your subscription and website login.
Already have a commenting profile? .

Invalid username/password.

Please check your email to confirm and complete your registration.

Only subscribers are eligible to post comments. Please subscribe or login first for digital access. Here’s why.

Use the form below to reset your password. When you've submitted your account email, we will send an email with a reset code.

Send questions/comments to the editors.

Sign In: