October 29, 2018 Science 1 Views
The storm has been growing since the end of May, and by mid-June had already covered 14-million square miles (35-million square miles) million square kilometers) or Mars’ surface, or a quarter of the planet.
Now, the experts say it’s grown to be a planet-circling dust event – though they do not quite know what’s driving it. series of images shows simulated views of a darkening Martian sky blotting out the Sun from NASA’s Opportunity Rover’s point of view, with the right side simulating Opportunity’s current view in the global dust storm (June 2018). The left starts with a blindingly bright mid-afternoon sky, with the sun appearing bigger because of brightness. The right shows the sun so obscured by dust it looks like a pinprick. Each frame corresponds to a tau value, or measure of opacity: 1
, 3, 5, 7, 9, 11. ” class=”blkBorder img-share” />
This series of images shows simulated views of a darkening Martian sky blotting out the Sun from NASA’s Opportunity Rover’s point of view, with the right side simulating Opportunity’s current view in the global dust storm (June 2018). The left starts with a blindingly bright mid-afternoon sky, with the sun appearing bigger because of brightness. The right shows the sun so obscured by dust it looks like a pinprick. Each frame corresponds to a value, or measure of opacity: 1, 3, 5, 7, 9, 11.
When the orbiter team saw the storm nearing opportunity, they notified the rover’s team to begin preparing contingency plans.
In a matter of days, the storm had ballooned.
It now spans more than 7 million square miles (18 million square kilometers) – an area greater than North America – and includes Opportunity’s current location at Perseverance Valley.
More importantly, the swirling dust has raised the atmospheric opacity, or ‘tau’ in the valley.
This is comparable to an extremely smoggy day that blots out sunlight. The rover uses solar panels to provide power and to recharge its batteries.
Opportunity’s power levels had dropped significantly by Wednesday, June 6, requiring the rover to shift to minimal operations.
On June 12, NASA confirmed the rover had fallen silent.
