The boundary of the Solar System remains somewhat poorly understood. We know we are within it, in a region of space called ...

Only two spacecraft have ever truly escaped the solar system, slipping beyond the Sun’s protective bubble into interstellar space. Their measurements are now reshaping how I understand the heliosphere ...

Telescopes around the world are now tracking a new visitor to our celestial neighborhood. Streaking through at a speed and trajectory that not even the Sun's immense gravity can capture, we will only ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today." When you purchase through links on our site, we may earn an affiliate ...