Basically anywhere in space without a spacesuit would be catastrophic.
20 amazing facts about space and astronomy - BBC Sky at Night Magazine
Living on Other Planets: What Would It Be Like?
Second Earth-sized World Found in System's Habitable Zone – Exoplanet Exploration: Planets Beyond our Solar System
If all of the planets in our solar system were combined, what would the resulting planet be like? - Quora
Can we smash together all of the asteroids to build a new planet?
Will there ever be a time when all our solar system's planets align?
Where did Mars's liquid water go? A new theory holds fresh clues.
Beyond Pluto: the hunt for our solar system's new ninth planet, Planets
See How Far You Could Jump, and How Strong You'd Be On The Surface of Saturn - A-Z Animals
Jupiter's moons could keep each other warm by raising tidal waves
A guide to the planets of the Solar System - BBC Sky at Night Magazine
Exactly How Much Life is on Earth? - The New York Times
Sounds of the Solar System: Podcast Eavesdrops on Planets