Interstellar Visitor

3I/ATLAS

Track the journey of the mysterious interstellar object as it travels through our solar system

Explore 3I/ATLAS

Critical Trajectory Milestones

Perihelion

Closest approach to the Sun

Oct 29, 2025

DAYS

HOURS

MINS

SECS

Earth Flyby

Closest approach to Earth

Dec 19, 2025

DAYS

HOURS

MINS

SECS

Live Trajectory

Track 3I/ATLAS in real-time with NASA data including current position, velocity, and sky coordinates.

Sky Observation

When Can You See 3I/ATLAS?

Get real-time visibility forecasts, sky location, and equipment recommendations for your location

Brightness Forecast

7-day magnitude predictions and visibility trends

Sky Location

Live coordinates and constellation information

Equipment Guide

Personalized recommendations based on current brightness

Updated daily with NASA JPL data

Discovery

What is 3I/ATLAS?

3I/ATLAS is a mysterious interstellar comet that originated from outside our solar system. Discovered in July 1st 2025, this celestial visitor offers unprecedented insights into the composition and formation of objects in distant star systems.

Latest Updates

Discovery

This Interstellar Comet Has a 16-Hour 'Heartbeat' and Scientists Can't Agree What It Means

European telescopes have detected a mysterious 16-hour pulsing pattern in interstellar comet 3I/ATLAS. Is it natural rotation or something more enigmatic?

December 5, 2025

Breaking

While NASA's Billion Dollar Telescopes Wait, Backyard Astronomers Are Tracking Our Solar System's Most Mysterious Visitor

Amateur astronomers are leading crucial observations of comet 3I/ATLAS during a critical period, filling gaps while professional telescopes prepare for systematic study of our mysterious interstellar visitor.

December 1, 2025