We know UV radiation isn’t good for us, but can it hold back all forms of life?
What happens when a star swings too close to a black hole?
Could the Moon have formed from multiple impacts? Find out in today’s guest post by Jacob Azoulay.
How to determine how fast a black hole is spinning? Its X-ray outbursts will tell you!
For tightly packed exoplanet systems, tidal force from other planets may be a significant factor to consider.