MYTUTOR SUBJECT ANSWERS

542 views

Is Pluto a planet?

Pluto is officially no longer classed as a planet, and here's why. The International Astronomical Union defined three rules in 2005 that a celestial body (an object observable within space) must follow to be classed as a planet:

1. The planet must orbit the sun.
2. The planet must be large enough that its gravity can smooth it into a nice spherical shape.
3. It must have cleared up the surrounding objects around it.
Pluto fails number three as it simply isn't massive enough to pull the surrounding objects into it's orbit. This is really hard for Pluto as it lives in the Kuiper Belt, a belt of other large rocky objects.
Fortunately for Pluto it matches the first two rules, so it can be classed as a dwarf planet instead!

Connor G. GCSE Physics tutor, IB Physics tutor, 13 plus  History tuto...

1 year ago

Answered by Connor, an A Level Physics tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

104 SUBJECT SPECIALISTS

£30 /hr

Anuradha D.

Degree: Physics (Masters) - Durham University

Subjects offered:Physics, Music+ 4 more

Physics
Music
Maths
Further Mathematics
Chemistry
-Personal Statements-

“Hello everyone! My name is Anuradha (you can call me Anu), and I am a Physics Undergrad at Durham. I have always had a “thing” for science and am so pleased to be studying it – and hope that I can give you all the support you need to ...”

Dylan  H. GCSE Further Mathematics  tutor, A Level Further Mathematic...
£26 /hr

Dylan H.

Degree: Materials Science and Engineering (Masters) - Imperial College London University

Subjects offered:Physics, Maths+ 2 more

Physics
Maths
Further Mathematics
Chemistry

“I offer tutoring in Maths, Chemistry and Physics and I am confident that I can help students to excel in exams through my engaging and interactive sessions. ”

£24 /hr

George B.

Degree: Physics with Industrial experience (Masters) - Bristol University

Subjects offered:Physics, Maths+ 1 more

Physics
Maths
-Personal Statements-

“I'm a Physics student at the University of Bristol. My passion is Physics and Maths. I love to help people understand what they previously found hard. ”

About the author

Connor G.

Currently unavailable: for regular students

Degree: Physics (Masters) - Bristol University

Subjects offered:Physics, Maths+ 2 more

Physics
Maths
History
-Personal Statements-

“About Me:I am a physics student at the University of Bristol. I have always had a deep passion in exploring the language of mathematics and applying it to physical concepts, and I hope that my tutorials will instill that passion in y...”

MyTutor guarantee

You may also like...

Posts by Connor

How do you expand brackets?

How important were the railroads in opening up the American West?

Is Pluto a planet?

Other A Level Physics questions

What is a potential divider?

Describe how a capacitor works.

A yacht is sailing through water that is flowing due west at 2m/s. The velocity of the yacht relative to the water is 6m/s due south. The yacht has a resultant velocity of V m/s on a bearing of theta. Find V and theta

Why is Kinetic Energy mv^2/2?

View A Level Physics tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok