The sea wasp box jellyfish is perhaps the most deadly variety. This translucent sea-dweller may not look all that menacing, but it is the most venomous animal on planet Earth. Box jellyfish are deadly to many different animals, not the least of all, us. If you get stung by one of these animals, you are very likely to die.
Earth and Mars Conjunction: On the opposite end of the scale, Mars and Earth can be 401 million km apart (249 million miles) when they are in opposition and both are at aphelion. The average distance between the two is 225 million km. When Mars and Earth are at their closest, you have your launch window.
at its farthest distance aphelion mars is 154 million miles 249 million km from the sun at its closest perihelion mars is 128 million miles 206 million km distant on average the distance to mars from the sun is 141 million miles 228 million kmmars revolves around the sun in 687 earth days which represents a martian yearmeasuring the distancen average the distance to mars from earth is 140 million miles 225 million km in their race around the sun earth on its inside track laps mars every 26 months this close approach provides an opportunity a launch window to send spacecraft to the red planet