Size and Scale: from a Telescope to the Universe

An interactive ladder of sizes. Zoom through 24 objects, or pick any two and see how many times bigger one is.

Compare two objects

Every object, from smallest to largest

Select any object to jump to it on the slider. Bars use a logarithmic scale, so each step to the right is a much bigger jump than it looks.

Sources

• NASA Science. About Hubble. 2026-09-11. Accessed October 8, 2026.
• NASA. International Space Station Facts and Figures. 2024-07-16. Accessed October 8, 2026.
• NASA Science. Pluto: Facts. 2025-04-22. Accessed October 8, 2026.
• NASA Goddard (NSSDC). Planetary Fact Sheet. 2025-03-18. Accessed October 8, 2026.
• NASA Science. Moon Facts. 2026-02-12. Accessed October 8, 2026.
• NASA Goddard (NSSDC). Sun Fact Sheet. 2024-05-09. Accessed October 8, 2026.
• NASA Science. James Webb Space Telescope. 2026-10-08. Accessed October 8, 2026.
• NASA Goddard (Imagine the Universe!). Imagine the Universe! Dictionary. 2020-09-25. Accessed October 8, 2026.
• NASA Science. New Horizons. 2026-05-11. Accessed October 8, 2026.
• NASA Science. Voyager 1: The Farthest Spacecraft. 2026-09-28. Accessed October 8, 2026.
• NASA. How Big is Space? We Asked a NASA Expert: Episode 61. 2025-05-21. Accessed October 8, 2026.
• NASA Science. Comet Facts. 2026-09-21. Accessed October 8, 2026.
• NASA Science. Exoplanet Travel Bureau: Proxima Centauri b. 2026-07-23. Accessed October 8, 2026.
• NASA Science. The Dog Star, Sirius, and its Tiny Companion. 2025-08-17. Accessed October 8, 2026.
• NASA Science. Messier 31 (The Andromeda Galaxy). 2026-09-04. Accessed October 8, 2026.