Fifty years ago, life was lived far more local than itis today. Anthony Giddens draws attention to how the eclipse oftime and the compression of space has contribut...

In $1676,$ the Danish astronomer Ole Roemer had one of those "aha" moments in science. He concluded from accumulated observations of eclipses of Jupiter's moon at different times of the year that light must travel at finite speed and needed 1300 s to cross the diameter of Earth's orbit around the Sun. Using $300,000,000 \mathrm{km}$ for the diameter of Earth's orbit, calculate the speed of light
based on Roemer's $1300-$ estimate. How does it differ from a modern value for the speed of light?

So this one is going to change depending on which site or news article or blawg that you happen to go to. Just remember that there's a lot of fake a strongly news out there in terms of people trying to make a bigger deal out of announcements than the scientists may have intended. So she was more reputable. Sites like Go to NASA specifically, um, space dot com is a pretty good one, Um, but any site that is reliable will have the best information.

Step one Surface histories of planets and satellites tell us how these bodies evolved through time. The better collaboration of the capturing time scale on Mars help us to understand the time development of modern walkin is and reliable. Eight estimate for the various journals and basins. Next step. The lunar samples and mediocrities samples fallen from space creator abundance and sequence of events that have shaped a planet's or satellite surface. The lowland plants of Mars are compared with the surface of Lunar Maria. Both has the same density of impact crater the formed between three and four billion years ago. Organisms and plants Formation provides the information of age of Mars, the order, impact and density of volcanoes SOS that activities are seized in eight a billion year or more ago. The youngest, Lee leave us on Olympus Moons SOS. That it's present surface is less than 100 million years old. The gain Therese Balkan knows indicated by this scattering rate are less than 10 million years. So this is the explanation. Please go through this. Thank you

So this is the website that you are asked to go to, uh, sticky little information on what you can learn at the top. Here's where you can change the solar eclipses of lunar eclipses, and then here it lists all the different solar and lunar eclipses for the next decade, and you can choose more different tactics. If you want on, then in this table will show you the region. So the second of this question asks about the fraction of, um, the people on Earth. It could see a solar eclipse versus a lunar eclipse. Now a solar eclipse is going to be the moon's shadow being cast on the earth, and that area is quite small, whereas the lunar eclipse is when the food goes through the earth's shadow and the Earth's shadow is much larger. And so anyone on the night side of the earth during a lunar eclipse will be able to see it. That's why these locations air. So, general, you know, for this total eclipse in made 2021 anyone in Asia, Australia, the Pacific of the Americans should be able to see it because during this gate at this time, it will be night time for these comments saying for all these, whereas if we go to a solar eclipse, let's look at once coming up here. Uh, they're gonna be a little bit more specific to the area. I believe if you even look at their maths solar eclipses again. Well, the maps are not have working for me, but the little streaks that you'll see of solar eclipse maps are the path of the moon's shadow will take across the earth, and it's much smaller than for allure.

Okay, So the plane Klink is given by, uh l'ecole square it of reduced plank's constant h bar times gravitational constant G over a speed of light seat. So this is ah, 1.5 Four times to tend toe negative. 34 jewel seconds. Times are gravitational constant, which is 6.673 6.673 times 10 to the negative 11 um, network. You just squared her kilograms squared. Uh, and this is divided by the speed of light. It's to me times tend to they meters per second. Okay, so the plank length is, um, about 1.62 times 10 to the negative 35 meters report be the time scale is given by plane clinked over a speed of light. That's the terroristic speed of this some, I think scale. And so this is 1.62 times 10 to the leg of 35 meters over three times 10 to the eight meters per second, giving you ah time of about 5.4 times 5.4 times 10 to the negative 44 uh, seconds or point about 0.0.5 times 10 to the 4.5 47. 40 p seconds. And so this is very close to the This is very similar to the ultra hot park that is mentioned in the book. That is about, um, 10 to the negative 43 seconds, and so it's within about half about.