There are currently eight planets in the Solar System: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, and Uranus.

Mercury is the planet closest to the Sun, however it is the planet with the smallest mass and radius of the 8 planets of the Solar System.

Its surface temperature can reach 427 degrees Celsius, so its gravity is not strong enough to maintain a stable atmosphere for long periods of time. Accordingly, the atmosphere of this planet is also very thin. This thin layer of atmosphere is confined to the exosphere on Mercury’s surface and consists mainly of small amounts of hydrogen and helium.

Hydrogen and helium are basically harmless to the human body, if inhaled in small amounts have little effect, but inhaling too much can cause suffocation.

Venus has no moon of its own, but has a dense atmosphere, about 92 times the mass of Earth’s.

The main composition of Venus’s atmosphere is carbon dioxide (about 96.5%), in addition it contains small amounts of nitrogen (about 3.5%) and small amounts of sulfur dioxide, argon, water vapor, carbon monoxide, helium, neon, hydrogen chloride, hydrogen fluoride and other gases.

Among them, sulfur dioxide and carbon monoxide are toxic gases to the human body. The carbon monoxide concentration on this planet is 17ppm, still within the safe range, however the sulfur dioxide concentration (about 150ppm) has reached a concentration that makes the human body feel uncomfortable.

After taking a short breath of the air on this planet, you will have to immediately move to a place with fresh air or breathe oxygen to avoid harm to the human body.

And if you take a long breath, it can cause ulcers and pulmonary edema until death from asphyxiation.

The third planet in the Solar System is Earth, so we won’t need to discuss this.

The air pressure on the surface of Mars is about 0.6% of Earth’s atmosphere and its main components are carbon dioxide (95.32%), nitrogen (2.7%), argon (1, 6%), oxygen (0.13%), carbon monoxide (0.07%), water vapor (0.03%) etc

Among them, carbon monoxide harmful to the human body has reached 0.07%, ie 700ppm, at this concentration if inhaled continuously for 45 minutes will cause poisoning. However, just one inhalation will cause your body to have to treat it promptly so as not to cause too great a loss in life and health.

Jupiter is the largest planet in the Solar System, is a gaseous planet, mainly composed of 88-92% hydrogen and 8-12% helium, and also contains a small amount of methane (about 0.3 %) and ammonia (0.026%).

Saturn, also a gaseous planet, is similar to Jupiter, but has a relatively high hydrogen content, with an ammonia content of about 0.0125%.

The ammonia content in the atmospheres of Jupiter and Saturn is not yet lethal, so if inhaled, it will cause an unpleasant sensation because of the pungent smell, but if inhaled for a long time can cause rhinitis, sore throat, pulmonary edema and other diseases.

Among the natural moons of Jupiter and Saturn, the moons containing the atmosphere are: Io, Europa, Ganymede, Callisto, Enceladus and Titan.

Io has a thin atmosphere, its atmospheric pressure is about one billionth that of Earth, and its main components are sulfur dioxide, sodium chloride, sulfur monoxide, and small amounts of oxygen.

Among them, sulfur dioxide accounts for more than 30%, if inhaled at this concentration for a long time can cause ulcers, pulmonary edema to suffocation…

Europa’s atmosphere is also very thin, composed mainly of oxygen, carbon dioxide and methane, if inhaled, it will be harmless to the human body.

Ganymede, the largest moon in the Solar System, has a radius even larger than Mercury, on which there is a dilute neutral atmosphere, composed mainly of oxygen, inhalation of this gas is harmless to the body. human.

Callisto’s atmosphere is dominated by carbon dioxide. The main components of Enceladus’ atmosphere are water vapor (91%), nitrogen (4%), carbon dioxide (3.2%), and methane (1.7%).

Titan, the largest natural moon of Saturn and the second largest moon in the Solar System, is the only moon in the Solar System with a thick atmosphere and its surface barometric pressure about 1 times, 5 times that of Earth.

About 98% of Titan’s atmosphere is nitrogen, making it one of the most nitrogen-rich objects in the Solar System. In addition to nitrogen, it also contains various hydrocarbons, such as methane. It is speculated that inhaling a single breath will not have much effect on the human body.

The atmospheres of the two ice giants Uranus and Neptune have a very similar composition, consisting mainly of hydrogen, helium, methane, and small amounts of heavy hydrogen compounds.

If you just look at the ingredients, taking a breath of the air at these two planets won’t do too much damage to the human body, but you’ll probably get frostbite (Uranus’ atmospheric temperature is around minus zero). 224 degrees Celsius ), or burns (the temperature of Neptune’s thermosphere can reach 500 degrees Celsius).

Of the natural satellites of Uranus and Neptune, only Triton has been confirmed to have an atmosphere. Triton is Neptune’s largest natural satellite, but Triton’s atmosphere is very thin, only 1.4 to 1.9 pascals, mainly composed of nitrogen, with very small amounts of methane and carbon monoxide near the surface. face. If you just breathe in the air here, it won’t have much effect on the human body.