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Any dictionary would give two basic definitions for the noun, perspective :. The representation in a drawing of parallel lines converging to give the illusion of depth and distance. The human capacity to view things in such a way as to see relationships and relative importance. Those definitions are accurate but do little to explore the importance of perspective in day-to-day living.

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Michael J. Our senses are stuck in the past. We hear the past. While sound travels about a kilometre every three seconds, light travels , kilometres every second. When we see a flash of lighting three kilometres away, we are seeing something that happened a hundredth of a millisecond ago. Read more: Curious Kids: Are there living things on different galaxies? But as we look further afield, we can peer further back. We can see seconds, minutes, hours and years into the past with our own eyes.

Looking through a telescope, we can look even further into the past. The Moon is our nearest celestial neighbour - a world with valleys, mountains and craters. We see the Moon not as it is, but as it was 1. Radio waves travel at the speed of light, so a message from mission control takes 1.

The Sun is about million km away, so we see it as it was about 8 minutes ago. Even our nearest planetary neighbours, Venus and Mars, are tens of millions of kilometres away, so we see them as they were minutes ago. When Mars is very close to Earth, we are seeing it as it was about three minutes ago, but at other times light takes more than 20 minutes to travel from Mars to Earth. At its closest to Earth, Saturn is still more than a billion kilometres away, so we see it as it was more than an hour ago.

The night sky is full of stars, and those stars are incredibly distant. The distances are measured in light years , which corresponds to the distance travelled by light in one year. Alpha Centauri , the nearest star visible to the unaided eye, is at a distance , times the distance between Earth and the Sun.

Some bright stars are much more distant still. Betelgeuse, in the constellation Orion , is about light years away. Even without a telescope we can see much much further. The Andromeda galaxy and the Magellanic Clouds are relatively nearby galaxies that are bright enough to be seen with the unaided eye.

The Large Magellanic cloud is a mere , light years away, while Andromeda is 2. For comparison, modern humans have only walked the Earth for about , years.

With the unaided eye you can look millions of years into the past, but how about billions? Well, you can do that at the eyepiece of an amateur telescope. Quasar 3C is an incredibly luminous object, which is brighter than individual galaxies, and powered by a huge black hole.

That said, you can spot it with a 20cm aperture telescope. A bigger telescope allows you to peer even further into space, and I once had the pleasure of using an eyepiece on a 1.

Read more: An expanding universe and distant stars: tips on how to experience cosmology from your backyard. Earth is just 4. Without really trying, you can see years into the past. And with the aid of a telescope you can see millions or even billions of years into the past with your very own eyes. York Festival of Ideas — York, York. Festival of Ideas — Hatfield , Hertfordshire. What is Quantum Technology?

Edition: Available editions United Kingdom. Brown , Monash University. Author Michael J. Brown Associate professor in astronomy, Monash University. We are seeing into the past too. A second back in time If you really want to look back in time, you need to look up. When we look at the Moon, we are seeing it as it was just over a second ago. Radio communications to the Moon have a perceptible time delay. The light travel time from Mars to Earth changes as the distance to Mars changes.

The finite speed of light presents some challenges for driving on Mars. Years The night sky is full of stars, and those stars are incredibly distant.

Some of the brightest stars in the sky are hundreds of light years away. As light moves at finite speed, we can see bursts of light echo off interstellar dust. Billions With the unaided eye you can look millions of years into the past, but how about billions?

Read more: An expanding universe and distant stars: tips on how to experience cosmology from your backyard Earth is just 4.

look at, look up | The Grammar Exchange

You may know that Google is tracking you, but most people don't realize the extent of it. Luckily, there are simple steps you can take to dramatically reduce Google's tracking. I see two sides of the story.

I've read somewhere that "at" is a preposition but "up" is not but adverb, but this doesn't solve my problem. Welcome back, Apple!

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Do You Know the Differences Between Look, Watch, and See?

Michael J. Our senses are stuck in the past. We hear the past. While sound travels about a kilometre every three seconds, light travels , kilometres every second. When we see a flash of lighting three kilometres away, we are seeing something that happened a hundredth of a millisecond ago. Read more: Curious Kids: Are there living things on different galaxies? But as we look further afield, we can peer further back. We can see seconds, minutes, hours and years into the past with our own eyes.

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To understand the difference between "see", "look at" and "watch" it helps to think about it in a few different ways.

I never knew just what a smile was worth But your eyes see everything without a single word 'Cause there's somethin' in the way you look at me. It's as if my heart knows you're the missing piece You make me believe that there's nothing in this world I can't be. I never know what you see But there's somethin' in the way you look at me If I could freeze a moment in my mind. I'd like to stop the clock, make time stands still 'Cause, baby, this is just the way I always wanna feel 'Cause there's somethin' in the way you look at me It's as if my heart knows you're the missing piece You make me believe that there's nothing in this world I can't be I never know what you see But there's somethin' in the way you look at me BRIDGE I don't know how or why I feel different in your eyes All I know is it happens every time 'Cause there's somethin' in the way you look at me It's as if my heart knows you're the missing piece You make me believe that there's nothing in this world I can't be I never know what you see But there's somethin' in the way you look at me The way you look at me.

How to use SEE, LOOK AT and WATCH in English

Have a look at this telling research from Pew on blasphemy and apostasy laws around the world. They are becoming more aware of what eating disorders are and what they look like. So many girls are idolizing these models and wanting to look like them. Halting a few paces away, Tracy motioned to us to avoid moving the bushes, but to approach the fence and look between the rails.

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When we look at something, we direct our eyes in its direction and pay attention to it:. Come and look at this photo Carina sent me. See means noticing something using our eyes. The past simple form is saw and the -ed form is seen :. I saw Trevor at the shopping centre yesterday. Watch is similar to look at , but it usually means that we look at something for a period of time, especially something that is changing or moving:.

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Ordered as I saw them: skull in coffee. blind guy reading. bloody pie. octopus arm grabbing kid. mosquito nose thing on 3rd guy sitting. hand-print on bathroom.

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