Printer Friendly

Collision course?

"Assault on Andromeda: Nearby galaxy had recent collision" (SN: 10/21/06, p. 261) states, "Several billion years from now, scientists predict, the galaxy and the Milky Way will collide ..." How can galactic collisions occur in an expanding universe, where galaxies should be moving away from each other?

JAMES HENDRY, FLORISSANT, MO.

On the large scale, objects are indeed receding from each other. But locally, the gravity of two large galaxies that are relatively near overcomes cosmic expansion.--R. COWEN
COPYRIGHT 2006 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2006, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

 
Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:LETTERS
Author:Hendry, James
Publication:Science News
Article Type:Letter to the editor
Date:Dec 16, 2006
Words:80
Previous Article:They're at it again.
Next Article:No-dad dragons: Komodos reproduce without males.


Related Articles
Letters in the Editor's Mailbag.
STUDENTS GET CRASH COURSE IN TRAGEDY; ANTI-DRUNK-DRIVING PROGRAM ENACTED AT SAUGUS HIGH.
BRIDGE PLAN ON 138 AIMS AT SAVING LIVES.
X-ray images highlight galaxy collisions.
NO LEADS FOUND IN HIT-AND-RUN.
BRIEFLY MOTORCYCLIST DIES IN VALLEY COLLISION.
"Little things mean a lot"--consider the humble lift letter.
VIGIL HELD FOR CRASH VICTIM FRIENDS, FAMILY TEARFULLY REMEMBER APRIL DUARTE.
Ricochets.

Terms of use | Privacy policy | Copyright © 2018 Farlex, Inc. | Feedback | For webmasters