If we hypothetically had the technology to travel 70 million light years away in an instant, along with some form of powerful telescope...when you looked at earth would you see earth as it was 70 million years ago, dinosaurs and all?

Earth, for instance - does it emit more energy than it receives from solar wind?

I found this article today and there is a statement that planets are generally giving away more than they get, in energy terms. I'm not sure if it's meant to be read in general context though.

So... do we calculate the thermodynamic properties of the planets in that manner? Are there 'hot' and 'cold' planets? Is this property significantly related to star proximity and is there a general trend?*

*I suspect the answer of the last question is - 'yes, they all get colder, due to enthropy'. But still, what do you think?

I want know who was the first human being that discoverd that we are living on earth !

Over the billions of years that the Earth has been orbitted by the Moon, its rotation has slowed by the slight resistance to the tide as it travels round the planet (relative to the Earth of course, it would appear static relative to the Moon).  The tide is of course caused by the gravitational pull of the moon and the equal and opposite gravitational forces of the Earth and the Moon keep the Moon nicely in orbit around the Earth.

As the force causing the braking effect of the tide is exerted by the Moon's gravity, there should be an equal and opposite force to the braking that is being exerted on the Moon.  As the tide is working as a brake on the rotation of the Earth, it would be expected that the bulge of tidal water is slightly ahead of the Moon with the Moon's gravity pulling it back.  I suspect that this bulge slightly offsetting the Earth's centre of gravity out of line with the Moon's centre of gravity and the Moon's centre of rotation might have some such effect.

Admittedly the effect would be rather small, but over the periods of time such as the time it has taken for the Earth's rotation to change from 6 hours per day to 24 hours per day surely there has been some effect.  If so, am I right in thinking that the Moon's orbit has quickened over time?  If so, I hope the Moon has stayed in equillibrium by adjusting its altitude (is that the right word?) and isn't thinking of leaving us to it once it has built up an escape velocity...

The solid mass of the world must fluctuate each years from fires , seasons,  meteorites etc but is the net weight constantly increasing and if so is the world getting bigger or denser?

Is our weight determined by the pull of gravity? Without gravity we are all weightless. 

My father used to have a colour atlas and on one of the pages there was a photograph taken from space which seemed to show 3 bright spots (almost like mirror type reflections) at a point on the earth where the Great Pyramids are located.. Could it be possible that the larger pyramids of Egypt could be viewed from space?

I once read in a book, a theory, which states that if one were to dig to the centre of the Earth in a straight line, then you would find yourself digging around the core.

Is this scientfically true and, if so,why? 

Often at first or last quarter the lit side of the moon may face up at 45degrees to the horizon when the sun is low down behind me.  I find it impossible to believe that the sun is lighting the moon in this case and want the moon's lit side to rotate down to align with the sun.