Pic of the Day, a warning to Dial Members

it is very big

The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth’s Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the Valles Marineris remains unknown, although a leading hypothesis holds that it started as a crack billions of years ago as the planet cooled. Recently, several geologic processes have been identified in the canyon. The above mosaic was created from over 100 images of Mars taken by Viking Orbiters in the 1970s.

it is Mars time as you all know

Sir Ulli

Wow! :eek:

Impressive photography indeed. :nod:

Wish I had a bigger monitor :frowning:

one new background just selected - that is so cool

Cheers :cheers:


Nice pic - that’s one BIG canyon! :boggle:

Now thats a cool picture:thumbsup:


That is one hell of a piccy :smiley:

Thanks for the pic Sir Ulli. :nod:

I hadn’t seen that one for years.

nice pic :slight_smile:

/set as background


Top pic… any links… i want more closeups of planets :slight_smile:


Being a Geology major back in college, many moons ago. I would swear some sort of liquid had a role in that erosion


:hail: :hail: :worship: :worship:

Very cool photo, nice one :thumbsup: :thumbsup: :thumbsup:

For our UK brothers (and sisters):

On 27 August at 9.51am GMT the Earth is a mere 56 million kilometres away from Mars, and small telescopes will reveal a red disc with dark markings and white ice caps. For experienced observers, the vital statistics at this time are: magnitude -2.9 and diameter: 25.11 arc seconds. Around this date, Mars rises at about 8.30pm in the constellation of Aquarius, the Water Bearer (see the diagram below). Helpfully, the Moon is new on the 27th, leaving the sky perfectly dark for observing. Opposition (when the Earth is aligned directly between the Sun and Mars) occurs the following day, on 28 August at 5.58pm.

It won’t quite be close enough to see the details in the Ulli’s picture though :wink:


it is Mars time

Mars co close es never before

Sir Ulli

that image is awesome!.. gonna go dig my telescope out and have a looky at mars :slight_smile: i seen it the other day while night fishing, mates reckoned it was a star but i was positive it was mars. i didnt know mars was in full view till the day after when i heard bout it on the radio :smiley: