Archive · 19 Jan 2026
Interstellar Intruders Spark Alien Speculation
Astronomers have spotted three objects from outside our solar system.
The first, Oumuamua, was found in 2017 and had a strange shape and movement.
Some thought it might be an alien spaceship, but there was no proof.
The second, Borisov, was discovered in 2019 and was more like a typical comet.
The third, ATLAS, was seen in 2025 and also sparked alien rumors due to its unusual tail.
Scientists believe these objects help us learn about other planetary systems without having to travel far.
They are not a threat but are interesting visitors from deep space.
Three interstellar objects (Oumuamua, Borisov, ATLAS) have been discovered since 2017.
Oumuamua had an unusual shape and movement, leading to speculation about it being an alien spaceship.
Borisov, discovered in 2019, was more like a typical comet with a cometary halo.
ATLAS, discovered in 2025, has a greenish glow and an unusual tail, sparking alien rumors.
Scientists believe these objects provide valuable insights into distant planetary systems and comet formation.
- Who
- Astronomers and amateur astronomers
- What
- Discovery of interstellar objects Oumuamua, Borisov, and ATLAS
- When
- Oumuamua (2017), Borisov (2019), ATLAS (2025)
- Where
- Solar system, originating from interstellar space
- Why
- To study distant planetary systems and comet formation
- First Intruder
- Oumuamua (2017)
- Second Intruder
- Borisov (2019)
- Third Intruder
- ATLAS (2025)
- Oumuamua's Shape
- Cigar or pancake
- Borisov's Composition
- Carbon monoxide, carbon dioxide, water ice
- ATLAS's Composition
- Carbon dioxide, nickel vapour
- ATLAS's Closest Approach
- 270 million km from Earth (December 19, 2025)