Since moving to Moscow, I haven't kept Brian up to date with Singapore school-work, just some Math. Science has been sorely neglected, and in his school's curriculum, science is taught as part of a unit of inquiry (some units do not contain science topics), not as a subject.
This evening, I decided it was time for him to start work on a Pri5 assessment book, which may be outdated since I bought this series some time ago, anyway, it's called Science Companion by EPH. His task was to read the first chapter on Solar System and then complete all the questions.
Some 5 minutes into his task, and on Page 5 of the book, he looked at me and said, "Mummy, this is wrong."
Me, surfing Malaysian election news (and some Jason Castro stuff of course) beside him, reply in an irritated way, "What are you talking about?"
Brian: "This part is wrong. It says that the sun does not move but I read somewhere that it moves."
See the 4th fact under Sun here, does not move.
Me, bewildered and worried that years away from Singapore have taken its toll: "WHAT??!! Of course the sun DOES NOT MOVE! Please ah, get your facts right okay!"
Brian: "But I read it in the Horrible Science book, that the sun and the whole solar system orbit the centre of the Milky Way."
Me: "Okay, then show me which book says this."
Brian: "Can't we just google it?"
Me, very convinced Singapore's workbook was right and him just mighty confused: "No, you always remember where you read stuff from. It can only be from Space, Stars and Slimy Aliens or The Gobsmacking Galaxy. Go look. You better get your facts right, don't get confused." I shake my head, big sigh in my heart.
30 seconds later, he shows me this and says, "See!"
Me: "Er...oh....okay, go google it and see what it says."
Brian goes off unwillingly: "But I've never seen anything that contradicts Horrible Science except this."
30 seconds later, he calls out to me from the study: "I found it."
Well, not only does the Sun move by revolving around the centre of the Milky Way, it also spins in a rotation known as a differential rotation, with its North and South Pole spinning a little slower than its equatorial centre.
Anyway, Brian said it's impossible for an object to orbit a stationary object indefinitely, cos the orbiting object would gravitate towards the stationary object and collide with it. I couldn't find anything on the net to confirm this, so if this is erroneous, please let us know.