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
Mrac [35]
3 years ago
5

Why is Pluto now called a dwarf planet

Physics
2 answers:
zvonat [6]3 years ago
7 0
Before Pluto was discovered, it was predicted. Astronomers had observed that massive objects can affect the orbits of its neighbors, and, after seeing deviations in the orbits of Uranus and Neptune, assumed something substantial existed beyond their orbits.
When Pluto was spotted, it was thought to be the predicted object and was identified as a ninth planet.
A few decades later, astronomers started discovering more and more objects around other stars and didn’t know whether to call them planets or not. There appeared to be a need to define what a planet means, and that led to what some people consider Pluto’s demotion to a dwarf planet.
The International Astronomical Union decided that full-sized planets must orbit the sun, have a round shape, and have cleared their orbits of other objects. Pluto fulfills the first two criteria, but not the third.
It still goes around the sun, it’s round enough, it’s got moons, and behaves like a planet, but the idea is that Pluto did not form the same way as the rest of the planets. Pluto’s orbit is both eccentric and inclined more than the rest of the planets by about 17 degrees. That’s suggests something is different about this object.
This debate about whether to call it a planet or not is silly, because it doesn’t matter to Pluto what you call it. It is an interesting object, goes around the sun, and shows geology and an atmosphere.
There’s a tendency to define objects based on what they are now, but nothing is constant in the universe. There are some issues with the nomenclature, and a definition today may not apply to the same object tomorrow.
Leto [7]3 years ago
7 0

Answer:

This is the shorter version to your answer

Explanation:

In 2003, astronomers discovered a new object beyond Pluto that they named Eris. That discovery caused astronomers to talk about the defining characteristics of a planet. They decided that because of its size and location, Pluto, along with Eris, were not planets. Pluto, Eris, and objects like them are now classified as dwarf planets.

You might be interested in
Which body is in equilibrium?
sergey [27]
"(1) a satellite moving around Earth in a circular <span>orbit" is the only option from the list that describes an object in equilibrium, since velocity and gravity are working together to keep the orbit constant. </span>
6 0
3 years ago
Read 2 more answers
Starting at (0,0) an object travels 36 meters north and then it covers 20 meters east. What is
Svetradugi [14.3K]

Answer:

Explanation:

Using the pythagoras theorem, the displacement is expressed as;

d² = x²+y²

y = 36m (north)

x = 20m east

Substitute;

d² = 36²+20²

d² = 1296+400

d² = 1696

d = √1696

d = 41.18m

For the direction;

theta = tan^-1(y/x)

theta = tan^-1(36/20)

theta = tan^-1(1.8)

theta = 60.95°

Hence the magnitude is 41.18m and the direction is 60.95°

8 0
3 years ago
What type of energy does a pv cell create ?
Alex_Xolod [135]

Answer:  Solar Photovoltaic (PV) cells generate electricity by absorbing sunlight and using that light energy to create an electrical current. There are many PV cells within a single solar panel, and the current created by all of the cells together adds up to enough electricity to help power your school, home and businesses.

                              <em>--Cited from </em><u><em>Solar Schools</em></u>

6 0
2 years ago
Read 2 more answers
Can anyone heelp me plzz plzz
Natali5045456 [20]
I think the answer is c) 1
Hope it helps and have a good day
4 0
2 years ago
Do you think that the formation of a rainbow is more a demonstration of the wave-like or particle-like behavior of light
kogti [31]

Answer:

The formation of a rainbow is more a demonstration of the wave-like behavior of light.

Explanation:

A rainbow is caused by the interaction of sunlight with atmospheric conditions. A rainbow formation results from the refraction and reflection of light due to changes in the light's wavelength direction.  Naturally, light enters a water droplet, slowing down and bending as it goes from air to denser water in a refraction as if "bent." Then light reflects off the inside of the droplet, separating into its component wavelengths or colors.  With light exiting from the droplet, a rainbow is formed.

6 0
3 years ago
Other questions:
  • In a certain process, the energy change of the system is 250 \rm kJ. The process involves 480 \rm kJ of work done by the system.
    9·1 answer
  • How can you differentiate between elements and compounds​
    10·1 answer
  • According to the theory of plate tectonics
    8·1 answer
  • If two waves with identical crests and troughs meet, what is happening? The wave is reflecting. Constructive interference is occ
    9·2 answers
  • Drawing is a form of<br>​
    8·1 answer
  • In a jigsaw classroom: A. students choose their own groups. B. students have to depend on one another to learn the required info
    11·1 answer
  • A wheelchair ramp is 5.2 m long and 0.8 m high. Calculate the ramp’s mechanical advantage
    12·1 answer
  • Please answer this question
    6·1 answer
  • HELPPPPPOPP
    7·2 answers
  • Please help me
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!