Unidentified flying object (UFO) and lights in a cloudy sky, computer artwork. This UFO is known as a 'Black Triangle', and theories explaining what i

---

Unidentified flying object (UFO) and lights in a cloudy sky, computer artwork. This UFO is known as a 'Black Triangle', and theories explaining what it is range from an alien spacecraft to top secret military aircraft. There are several aircraft that use triangular delta-wing designs (such as the US B-2 Spirit stealth bomber), and these lights look like aircraft landing lights. There is no evidence that conclusively shows that alien spacecraft have ever visited Earth.

---

Size: 6000px × 4800px
Photo credit: © VICTOR HABBICK VISIONS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: artwork, astronomy, bang, big, cosmology, dwarf, earth, explosi, explosion, jupiter, mars, mercury, neptune, planet, planetary, planets, pluto, saturn, science, solar, system, uranus, venus