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Our journalists and guest bloggers bring you stunning imagery and the space stories that matter most.

Saturn's small satellites, to scale

Emily Lakdawalla • May 17, 2017 • 3

Emily shares another of her popular size comparisons of solar system bodies, taking advantage of Cassini's recent views of Saturn's tiniest moons.

Favorite Astro Plots #4: Classifying Exoplanets

Jingjing Chen • April 15, 2016 • 6

Until just a few years ago, a plot of mass versus size of other worlds would have looked pretty sparse and uninformative. But thanks to the tireless efforts of exoplanet astronomers, we now know fairly precise masses and radii for hundreds of distant worlds.

30th anniversary images of Uranian moons

Emily Lakdawalla • February 02, 2016 • 6

January 24 was the 30th anniversary of the Voyager flyby of Uranus. Uranian moons have been on my mind ever since New Horizons sent us close-up images of Charon. On the occasion of the anniversary, Ted Stryk produced latest-and-greatest versions of the Voyager views of these worlds.

Planetary Exploration Timelines: A Look Ahead to 2016

Emily Lakdawalla • December 31, 2015 • 19

How many planetary exploration missions are there, and where are they? These days, it's hard to keep track, because there are so many. I plan to begin the new year by taking stock of active missions, figuring out what each has set out to do and accomplished so far, but first I want to step back to consider the spread of missions across the solar system as a whole.

The round worlds in the solar system: An updated graphic

Emily Lakdawalla • November 02, 2015 • 9

I have a newly updated scale comparison graphic to share: all the round worlds in the solar system smaller than 10,000 kilometers in diameter, now with added Pluto, Charon, and Ceres.

The solar system at 1 kilometer per pixel: Can you identify these worlds? The answers

Emily Lakdawalla • September 30, 2015 • 13

Last Friday I posted an image containing 18 samples of terrain, all shown at the same scale. Were you able to figure out which square was which? Here are the answers.

The solar system at 1 kilometer per pixel: Can you identify these worlds?

Emily Lakdawalla • September 25, 2015 • 13

A look at the surfaces of 18 worlds in our solar system, all at the same scale.

Galileo's best pictures of Jupiter's ringmoons

Emily Lakdawalla • August 24, 2015 • 4

People often ask me to produce one of my scale-comparison montages featuring the small moons of the outer solar system. I'd love to do that, but Galileo's best images of Jupiter's ringmoons lack detail compared to Cassini's images from Saturn.

The not-planets

Emily Lakdawalla • July 14, 2015 • 38

Now that I have a reasonable-resolution global color view of Pluto, I can drop it into one of my trademark scale image montages, to show you how it fits in with the rest of the similar-sized worlds in the solar system: the major moons and the biggest asteroids.

Adding Churyumov-Gerasimenko to my scale comparison of comets and asteroids

Emily Lakdawalla • March 13, 2015 • 4

Having found a color photo of the comet, I finally added Churyumov-Gerasimenko to my scale comparison of comets and asteroids visited by spacecraft.

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