Do the other planets have atmospheres and are they different to Earth's?

Mercury has a very thin atmosphere with a surface pressure of about 0.5 nPa that is composed mostly of particles from the sun (solar wind) and surface decay, with traces of other substances such as hydrogen and helium. The solar wind is also responsible for the atmosphere's constant sweeping away.

Venus has a surface pressure of 9.2 MPa and a dense, hot atmosphere that is primarily composed of carbon dioxide.

The atmosphere of Earth has a surface pressure of 101.4 KPa and is made up of 78% nitrogen, 21% oxygen, and traces of neon, carbon dioxide, and other gases.

The atmosphere of Mars is 600 Pa at its surface and is mostly composed of carbon dioxide.

Jupiter is a gas giant with no surface and an atmosphere that is roughly 90% hydrogen and 10% helium.

As a gas giant with no surface, Saturn has an atmosphere made of hydrogen, helium, and sulfur, which gives it its yellow color.

Being an ice giant, Uranus has no surface and an atmosphere made of hydrogen and helium as well as ices like water, ammonia, and methane.

As an ice giant, Neptune has no surface and an atmosphere made of helium and hydrogen as well as ices like methane.

Yes, other planets have atmospheres, but their compositions vary. Earth's atmosphere primarily consists of nitrogen and oxygen, while other planets may have atmospheres composed of gases like carbon dioxide, methane, or sulfuric acid. Additionally, some planets, like Venus, have thick, dense atmospheres, while others, like Mars, have thinner atmospheres.