tidal force

Black hole is a 'time machine', object more than 13 billion years old revealed?
Researchers have developed a method that takes advantage of black holes to study seemingly elusive objects from the early universe.
For the first time, astronomy discovered a planet with half of its hemisphere in eternal darkness
Imagine if this happened to Earth, Americans would have to go to Vietnam just to see the Sun.
Venus, Earth and Jupiter combine forces to cause the solar storm?
Research by German scientists found a correlation between the number of sunspots and the alignment of Venus, Earth and Jupiter.