The Galactic Heat Index

A Measure of Planetary Desperation

The heat index, also known as the "Galactic Heat Index" (GHI), measures the combined effects of heat and humidity to determine the apparent temperature felt by a person. It's like, exactly as it sounds: a measure of how hot it feels when you're on a planet with an atmosphere.

Frequently Asked Questions

• Q: Is the heat index just the air temperature?
• R: Nope! The heat index takes into account the humidity, which can make a huge difference. For instance, if it's 90 degrees Fahrenheit (32°C) and 60% humidity, it'll feel like 120 degrees F (49°C) to you!

Current Heat Index Values

• Planet: Mercury - GHI: 200° F (111°C)
• Planet: Mars - GHI: 140° F (60°C)
• Planet: Venus - GHI: 900° F (500°C) (Note: That's hot. Like, "don't even step out of bed" hot.)

More Heat Index Records | How the Heat Index is Calculated