What planet was once thought to be two planets?

Both Mercury and Venus have been known as the "morning star" or "evening star" in some form for various cultures and civilizations. Sometimes, these evening and morning appear (MORE)

What two planets have storms?

Jupiter famously evidences the great red spot which is a stormongoing for hundreds of years. Neptune also has a great dark spotwhich is also a storm, but it comes and goes. Pl (MORE)
In Science

What are two first two planets?

The first two planets discovered were Earth and Mars. Another Answer: The first two planets, with respect to the Sun, are Mercury and Venus.