a star-size object visited the solar system and tweaked these planets' paths. The team carried out 50,000 simulations of such events, using computer models of the four outer planets, each over 20 ...

The Sun is about 100 times wider than the Earth and the Earth could fit into the Sun over one million times. It would take 500 years for the fastest person on Earth to run the distance from the ...

Out in the vast darkness between star systems, these worlds wander through the interstellar void, sometimes in pairs, and when they encounter a solar system ... Model rocket maker Estes' stunning ...