Part 1 Our Place in the Universe

Presentation Transcript

Part 1 Our Place in the Universe

1.1 A Modern View of the Universe Our objectives for realizing: What is our place in the universe? How could we have been able to we come to be? In what manner would we be able to know what the universe resembled previously? Could we see the whole universe?

1) What is this? Star A vast, gleaming bundle of gas that creates warmth and light through atomic combination

2) What is this? Planet A tolerably vast question that circles a star; it sparkles by reflected light. May be rough, frosty, or vaporous in sythesis. Mars Neptune

Moon (or satellite) 3)What is this? A question that circles a planet. Ganymede (circles Jupiter)

Asteroid 4) What is this? A moderately little and rough question that circles a star. Ida

Comet 5) What is this? A generally little and cold question that circles a star.

6)What is this? Star System A star and all the material that circles it, including its planets and moons

Nebula 7) What is this? An interstellar billow of gas and additionally tidy

8) What is this? Cosmic system An extraordinary island of stars in space, all held together by gravity and circling a typical focus M31, The Great Galaxy in Andromeda

Universe 9) What is this? The entirety of all matter and vitality; that is, everything inside and between all cosmic systems

What is our place in the universe?

How could we have been able to we come to be?

How would we be able to know what the universe resembled before? Light goes at a limited speed (300,000 km/s). Along these lines, we consider articles to be they were before: The more remote let's get this show on the road look in separation, the further back we look in time.

Example: We see the Orion Nebula as it looked 1,500 years back. M31, The Great Galaxy in Andromeda

Example: This photograph demonstrates the Andromeda Galaxy as it looked around 2 1/2 million years back. Address: When will have the capacity to see what it would seem that now? M31, The Great Galaxy in Andromeda

Light-year The separation light can go in one year. Around 10 trillion km (6 trillion miles).

How far is a light-year?

How far is a light-year? What is that number in logical documentation?  9.46  10 12 km

At awesome separations, we consider articles to be they were the point at which the universe was much more youthful. The universe is around 14 billion years of age.

1.2 The Scale of the Universe Our objectives for realizing: How enormous is Earth contrasted with our close planetary system? How far away are the stars? How huge is the Milky Way Galaxy? How huge is the universe? How do our lifetimes contrast with the age of the universe?

How enormous is Earth contrasted with our close planetary system? How about we decrease the span of the nearby planetary group by a variable of 10 billion; the Sun is currently the extent of a vast grapefruit (14 cm distance across). How huge is Earth on this scale? an iota a ball point a marble a golf ball

Let's diminish the measure of the close planetary system by a component of 10 billion; the Sun is currently the extent of a substantial grapefruit (14 cm distance across). How huge is Earth on this scale? an iota a ball point a marble a golf ball What is the separation between the Earth and the Sun? - around 100 sun oriented distances across

The size of the nearby planetary group

How huge is the Milky Way Galaxy? Thought Question Suppose you attempted to tally the more than 100 billion stars in our cosmic system, at a rate of one every second… How long would it take you? a couple of weeks a couple of months a couple of years a couple of thousand years

Suppose you attempted to tally the more than 100 billion stars in our cosmic system, at a rate of one every second… How long would it take you? a couple of weeks a couple of months a couple of years a couple of thousand years

How enormous is the Universe? The Milky Way is one of around 100 billion universes. 10 11 stars/cosmic system x 10 11 worlds = 10 22 stars As numerous stars as grains of (dry) sand on all Earth's shorelines…

Now we should venture through the Universe in forces of 10:

How do our lifetimes contrast with the age of the Universe? The Cosmic Calendar: a scale on which we pack the historical backdrop of the universe into 1 year.

How do our lifetimes contrast with the age of the Universe?

1.3 Spaceship Earth Our objectives for realizing: How is Earth moving in our nearby planetary group? How is our nearby planetary group moving in the Galaxy? How do worlds move inside the Universe? It is safe to say that we are always sitting still?

How is Earth moving in our close planetary system? In opposition to our observation, we are not "sitting still." We are moving with the Earth in a few courses, and at shockingly quick speeds… The Earth turns around its pivot once consistently.

Earth circles the Sun (rotates) once consistently: at a normal separation of 1 AU ≈ 150 million km. with Earth's pivot tilted by 23 .5º (indicating Polaris) and turning in a similar heading it circles, counter-clockwise as saw from over the North Pole.

Our Sun moves haphazardly in respect to alternate stars in the nearby Solar neighborhood… run of the mill relative velocities of more than 70,000 km/hr yet stars are so far away that we can't without much of a stretch notice their movement … And circles the universe each 230 million years.

How do cosmic systems move inside the universe? Cosmic systems are conveyed alongside the extension of the Universe. In any case, how did Hubble make sense of that the universe is growing?

Hubble found that: All cosmic systems outside our Local Group are moving far from us. The more removed the world, the quicker it is hustling ceaselessly. Conclusion: We live in a growing universe.

Are we continually sitting still? Earth pivots on hub: 1,000 km/hr Earth circles Sun: 100,000 km/hr Solar framework moves among stars: ~ 70,000 km/hr Milky Way turns: ~ 800,000 km/hr Milky Way moves in Local Group Universe grows