1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alekssr [168]
4 years ago
9

We see the universe now as it existed in the past. True or False

Physics
2 answers:
kozerog [31]4 years ago
5 0

Oh it's even worse and more complicated than THAT !

We see every object in the universe as it existed at a different time
in the past.  That's because we don't see it until the light from it gets
here, and from anything outside our own solar system, that time is
very substantial.

-- We see the moon as it was 1.3 seconds ago.

-- When Mars is closest to us, we see it
     as it was 14 minutes ago.
   When Mars is farthest from us, we see it
     as it was 22 minutes ago.

-- We see the sun as it was 8 minutes ago.

-- When Neptune is closest to us, we see it
     as it was 4 hours ago.

-- We see Proxima Centauri, the nearest star outside
     our solar system, as it was 4.3 years ago.

-- Polaris ... the North Star ... is located at a distance of about 375 light years
     from us.  So when you see the North Star tonight, you see it was it was
     around the year 1740.

-- We see the Andromeda Galaxy, the nearest galaxy outside
     the Milky Way, as it was 2.5 million years ago.

-- We saw the gravity waves from the merger of two black holes
     as they were 1.3 billion years ago.

The principle of the thing is mind-boggling.  You don't see ANYTHING as it is
right now. You only see it when the light from it reaches you.  Even, say, the
refrigerator standing 15 feet away from you across the kitchen ... you see it
as it was 0.000000015 second ago.

maw [93]4 years ago
5 0
Is false, in my opinion, because in the past the universe was different, the planets, stars, asteroids and galaxies are in motion always, but that's from a point of view. From another point od view, this sentences is true, because the universe, as in the past, remained unchainged, because the universe will never change - as it was, and will remain.
You might be interested in
Sensible heat involves a change in which aspect of a substance?
garik1379 [7]
Sensible heat involves a change in temperature.
6 0
4 years ago
Jupiter is 317 times more massive than the Earth. An astronaut on Jupiter would _____. weigh less than on Earth weigh more than
Softa [21]

Since "you will weigh more on jupiter" isn't an option, your answer is  <u>B."weigh more than on Earth"</u> <em>btw ik this is a late answer but for the people out there still searching for an answer hope this helps!</em>

8 0
3 years ago
Why should you be physically active?
emmasim [6.3K]

Answer:

You should be physically active because you need to exercise or you might become overweight/obese. Exercise helps burn off calories which cause obesity. It is also good for your heart and lungs it keeps them active and healthy.

8 0
3 years ago
Read 2 more answers
When two kinds of pulleys are used together the system is called
jekas [21]
They are called fixed and movable pulleys
3 0
3 years ago
A 0.5kg bird has a PE of 137.2 J. What height is its perch?
jekas [21]

PE = mgh

137.2 = .5*9.8*h

h=137.2/(.5*9.8)

7 0
3 years ago
Read 2 more answers
Other questions:
  • A road with a positive cross slope is highest __________.
    8·1 answer
  • Please need help on this one
    10·1 answer
  • Which statement belongs to Dalton’s atomic theory? Atoms have a massive, positively charged center. Atoms cannot be created or d
    7·2 answers
  • The smallest particle of an element that retains the properties of that element
    11·1 answer
  • A. A piece of paper near a magnet
    7·2 answers
  • A toy boat travels 18 meters in 3.2 seconds. What is the average speed of the boat?
    7·1 answer
  • Help questions 5&amp;6 about force​
    8·1 answer
  • Suppose one wishes to accelerate a 2000 kg Toyota from 10 m/s 30 m/s in 8 seconds. What force would be required?
    6·1 answer
  • A car is initially sliding backwards down a hill at -25 km/h. The driver guns the car. By the time the car's velocity is +35 km/
    8·1 answer
  • Explain this question​ in summary
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!