Question

Which exoplanet is smallest?

a) OGLE-TR-113b
b) HD 209458-b
c) TrES-1
d) XO-1b

Answer 1

Exoplanet OGLE-TR-113b is the smallest confirmed exoplanet discovered so far.

Step-by-step explanation:

While the sizes of exoplanets are constantly being measured and refined, OGLE-TR-113b currently holds the record for the smallest confirmed exoplanet. Its radius is estimated to be only 1.04 Earth radii, making it even smaller than Venus.

Here's a comparison of the radii of the other options:

HD 209458-b: 1.36 Earth radii

TrES-1: 1.08 Earth radii

XO-1b: 1.18 Earth radii

While these other exoplanets are also incredibly small, they are still slightly larger than OGLE-TR-113b, making it the undisputed smallest confirmed exoplanet.