Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

You’ll be able to view a rare alignment of planets this month and into February. Our astrotourism expert reveals the best ...