Member Since May 28, 2006 , From Israel
About duba: Geologist (its more than enough)

Recent Activity by duba

Answered: Why....?

because !!!!......

Answered: What is dark energy?

excellent answer: http://hubblesite.org/hubble_discoveries/dark_energy/

Answered: Telescopic technology keeps advancing, so when do ...

We don't need earth telescops. We will use space telescops that can see bodies without disturbance of the atmosphere.

Answered: How big is th sun?

Hi Diameter = 1,390,000 km. mass = 1.989e30 kg. [[Earth = 12,756 km. ]]

Answered: Earth and Sun

App = 149.5 milion Km. [[ = 500 sec speed of light, or 8.3 minute speed of light ]]

Answered: Are they going to renew the space shuttles when ...

NO. The original plan was to build a new shuttle (more sophisticated), but Obama stop the plan by reducing the budget to NASA. As for now , all the supply to ISS will be done by the Russian shuttle ...

Answered: How old is Yellowstone Park?

Tens of rhyolite lava flows were erupted one after another in central Yellowstone. Canyon Village is built on one. Elephant Back Mountain, west of Lake Hotel, is another. Several flows make up the ...

Answered: What is the "Hubble Law", and how can it ...

Hi youwill find an answer here: http://astrosun2.astro.cornell.edu/academics/courses//astro201/hubbles_law.htm And here: http://csep10.phys.utk.edu/astr162/lect/cosmology/hubble_constant.html

Answered: How do we know the mass of a given black hole ...

There are at least two different ways to describe how big something is. We can say how much mass it has, or we can say how much space it takes up. Let's talk first about the masses of black holes ...

Answered: A Blue Atmosphere?

Hi on the contrary :- the blue color of the sea is a reflection of the sky . The light of the sun is a mixture of all colors.The sun's light breaks by the molecules of water and dust,and we see only ...

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