Science Questions

What is the 'background' when measuring using parallax?

Wed, 25th Sep 2013

Listen Now    Download as mp3 from the show Exploring the Solar System

Question

Derek McComiskey asked:

From: Derek McComiskey <derek@marpleclocks.co.uk>

To: chris@thenakedscientists.com

Sent: Friday, 9 August 2013, 15:23

Subject: Contact the Naked Scientists (please do not alter this subject)

 

 

 

Hi,

 

I've just been listening to this week's programme, with the piece about

mapping the milky way using parallax. This left me with two

questions:

* To observe something moving because of parallax, you need to see the movement against a more distant background. What are they using as background?

* Are there still significant risks with launches into orbit. It was made to sound so mundane!

 

Thanks,

 

Derek

McComiskey

derek@marpleclocks.co.uk

www.marpleclocks.co.uk

workshop:

0161 427 0350

mobile: 07905 102431

 

 

Answer

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