Back to Home

God & Science Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | God and Science | Post

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Bruce, Earth Also Moves (with 30 Km/s).

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Alexander on January 10, 2002 21:36:44 UTC

So if an asteroid is crossing Earth orbit perpendicular to Earth's motion, then the relative to Earth velocity is sqrt(19.4^2+30^2)=35.7 km/s.

If the asteroid moves "head-on" to Earth, then v = 19.4+30 = 50 km/s

If it moves "head to tail" with Earth, then Earth hits it with velocity 30-19.4 = 10 km/s.

This is NOT INCLUDING the effect of gravity of earth. As asteroid falls on Earth it additionally accelerates to roughly the escape velocity (extra 11 km/sec) wich should be vectorly added (on the top of their mutual orbital velocities).

So I think that the average velocity of falling on Earth rocks is still above 30 km/sec.

Follow Ups:

Login to Post
Additional Information
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2023 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins