# sun

### Increase in Radius when a Star becomes a Red Giant

Hi there, I have a question regarding the life cycle of a star. I know that when entering the red giant phase of a star's life, its radius/overall...
Thread by: Madi Araly, Feb 23, 2016, 3 replies, in forum: Astronomy and Astrophysics

### Why does the moon look full in my photos,...

...so close to the Sun's position? Is this even possible? First two, taken around May 1st, 2015. Last one, taken in October, 2015
Thread by: Jessica Ann Yost, Feb 15, 2016, 53 replies, in forum: Astronomy and Astrophysics

### Centripetal forces in our solar system

i calculated the centripetal forces in our solar system but i can't seem to find a connection using the centripetal force formula: Fmpz=(m⋅v2)/r...
Thread by: nibbel11, Jan 29, 2016, 4 replies, in forum: General Physics

### How to find the speed of a planet around the sun

1. The problem statement, all variables and given/known data THe sun has a mass of 1.99x10*30 kg. Jupiter has a mass of 1.90x10*27 kg and a mean...
Thread by: Matthew_Maz, Jan 13, 2016, 1 replies, in forum: Introductory Physics Homework

### Coronal hole and magnetic field

Hey guys, I have a question. I am doing some homework for university and got super confused (probably just messing up things). So in school you...
Thread by: ATY, Sep 4, 2015, 3 replies, in forum: General Physics

### Why does the tropical sun feel hotter in the evening?

Dear friends, I'm currently living at the equator. Here, homes that have primarily east facing windows are hotter than north or south facing...
Thread by: mdique, Jun 5, 2015, 1 replies, in forum: General Physics

### Calculation of a comet orbiting Sun

1. The problem statement, all variables and given/known data a comet is orbiting around the Sun in a parabolic orbit . center of the sun to...
Thread by: MelkoRR, May 30, 2015, 13 replies, in forum: Advanced Physics Homework

### Surface temperature of a planet revolving a sun

1. The problem statement, all variables and given/known data Find the surface temperature of a small planet having circular orbit around the sun...

### What's in the center (at r=0) of the sun?

1. The problem statement, all variables and given/known data There is no given data.the instruction ask to write ab essay about this topic.what...
Thread by: elif, Apr 25, 2015, 16 replies, in forum: Introductory Physics Homework

### Scientific importance of total Solar eclipses?

I was wondering whether there is an actual scientific point of taking ground-based photographs of the Solar corona during total eclipses on Earth....
Thread by: tarquinius, Mar 31, 2015, 10 replies, in forum: Astronomy and Astrophysics

### How wide is the observable horizon, at sea level?

I'm quite aware of how to compute how FAR you are from the horizon, but my question is, how WIDE is the observable horizon at sea level (like,...
Thread by: Lonious, Mar 27, 2015, 10 replies, in forum: Astronomy and Astrophysics

### Absorbed energy from the sun, where does it end up?

Ok, we had a discussion in class: If we build solar panels all over the earths surface we can collect a good amount of energy. If we use this...
Thread by: Baconfish, Nov 27, 2014, 20 replies, in forum: General Physics