Altjira, also known as 2001 UQ18, is located in the outer reaches of the Solar System, 6 billion km (3.7 billion miles) away, or 44 times the distance between Earth and the Sun. This artist’s concept depicts one of the possible scenarios for the Altjira system in the Kuiper Belt. Image credit: NASA / ESA / Joseph Olmsted, STScI. “Hubble images show two Kuiper-belt objects (KBOs) located about 7,600 km (4,700 miles) apart,” said Brigham Young...