Mars Mission 2020

Nasa will launch a mission to Mars in 2020. This may sound shocking until you learn that this will be another unmanned mission sending a robotic rover to explore the surface and perform experiments.

Manned Mission

The next manned mission to another terrestrial object will probably be a 2024 mission to the moon. We should be good at this, and it is good practice for manned exploration of other terrestrial destinations.

How soon?

The soonest time we might imagine a manned mission to Mars, even just for orbit, would be 2033 returning in 2035. The departure and return times would normally be about 26 months apart. Based on the orbit of the Earth and Mars, 26 months pass between minimums when travel time and energy required would be ideal. Travelling at the wrong time could increase the time and energy required by double. Ideal travel windows for the shortest possible mission (26 months) occur twice a century.

Consider that picking the ideal time would allow the mission to leave Earth and travel to Mars and return in just over 26 months. Picking the worst time for the mission could require in excess of five to ten years to complete.


A variable of great import in a trip to Mars is the type and quantity of fuel to use. To achieve the fastest travel time, you would want to accelerate until half way to Mars, and then decelerate until you land. You would need of course, to have plenty of fuel left to get home.

Asteroid 2019 OK

On July 24, 2019 an asteroid measuring between 60 and 140 meters in diameter whizzed by planet earth. It was the largest bolide to come between the Earth and the Moon this year. To compare, the Chelyabinsk meteor was estimated to be around 20 meters in size, where 1,491 injuries were reported according to Wikipedia.

Surprise asteroid whizzed by Earth today, and we didn’t even blink via @CNET

An asteroid just buzzed past Earth, and we barely noticed in time via @ConversationEDU

Asteroid 2019 OK to flyby Earth at 0.19 LD on July 25 – the largest of the year