JMARS

Clear, up-to-date instructions for using JMARS tools and images to explore Mars—and other planetary bodies.

Start Here:

STEP 1 — Download JMARS
Open JMARS on your computer

STEP 2 — Learn the Basics
Start with the JMARS Quick Start guide

STEP 3 — Explore Mars
Use the tool instructions below while JMARS is open.

👉 Ask questions. Explore answers! Click a tool below for step-by- step instructions.

Elevation Color Legend for Explore Map Layer (NASA) - zoom levels 1-32 ppd

How wide is Olympus Mons based on this measurement?

How does vertical exaggeration help you see features more clearly?

TES: Hematite

How could this mineral have formed—and what conditions would be needed?

Is this feature raised—or is it a depression? What does the elevation profile reveal?

“What process formed this surface and what evidence supports that process?”

What changes between day and night—and why?