Is it true SETI is used to find aliens?

Message boards : SETI@home Science : Is it true SETI is used to find aliens?

Author	Message
Aillyn Volunteer tester Send message Joined: 2 Nov 09 Posts: 3 Credit: 99,432 RAC: 0	Message 947684 - Posted: 16 Nov 2009, 21:01:07 UTC
	It analyzes sound waves in space? I thought sound didn't work in space.
	ID: 947684 ·

skildude Send message Joined: 4 Oct 00 Posts: 8942 Credit: 36,585,061 RAC: 59,120	Message 947697 - Posted: 16 Nov 2009, 21:33:14 UTC - in response to Message 947684.
	its actually radio waves at 1400 Mhz. this is a signal length beyond our hearing. See how it works here ____________ Proud member of TSWB. End terrorism by building a school
	ID: 947697 ·

champ Volunteer tester Send message Joined: 12 Mar 03 Posts: 3642 Credit: 1,489,147 RAC: 0	Message 947699 - Posted: 16 Nov 2009, 21:41:00 UTC
	It is very noisy out there. Read this side and listen: Space sounds ____________
	ID: 947699 ·

Aillyn Volunteer tester Send message Joined: 2 Nov 09 Posts: 3 Credit: 99,432 RAC: 0	Message 947700 - Posted: 16 Nov 2009, 21:49:51 UTC - in response to Message 947699.
	So how does the SETI program distinguish alien signals from random radio spam? I'm assuming aliens would have a completely different set of signals (if they're even radio at all.) Also are we sending out any sound waves to anyone out there? What if there's an alien planet who has a "seti" program looking for other life? Can they hear us?
	ID: 947700 ·

VBobier Send message Joined: 30 Nov 03 Posts: 40801 Credit: 32,090,523 RAC: 19,198	Message 947730 - Posted: 16 Nov 2009, 23:14:20 UTC
	I think the 1400MHz may be related to this Here, Which is the Hydrogen line. ____________ BSG Anthem My Facebook page
	ID: 947730 ·

John McLeod VII Volunteer developer Volunteer tester Send message Joined: 15 Jul 99 Posts: 22343 Credit: 439,209 RAC: 396	Message 947731 - Posted: 16 Nov 2009, 23:19:58 UTC - in response to Message 947700.
	So how does the SETI program distinguish alien signals from random radio spam? I'm assuming aliens would have a completely different set of signals (if they're even radio at all.) Also are we sending out any sound waves to anyone out there? What if there's an alien planet who has a "seti" program looking for other life? Can they hear us? The antanna sweeps the sky at the same rotation rate as the Earth. Given the beam width of the antenna, a signal would rise and fall inside a particular shaped envelops (think bell curve). SETI also looks for spikes and triplets. SETI also insists that the signal repeat from the same place in the sky on different nights. We are broadcasting radio frequency all of the time - all of the TV and Radio broadcasts ever put on the airways are still traveling through space. It is not sound waves as sound waves require a liquid, solid, or gas to travel through. Space is a vacuum and cannot transmit sound. But electromagnetic radiation (radio, tv, microwaves, infra red, visible light, ultra violet, xrays, and gamma rays) do travel quite well through a vacuum. ____________ BOINC WIKI
	ID: 947731 ·

junicks Send message Joined: 3 Dec 09 Posts: 4 Credit: 8,728 RAC: 0	Message 953184 - Posted: 8 Dec 2009, 9:22:21 UTC - in response to Message 947700. Last modified: 8 Dec 2009, 9:35:11 UTC
	Also are we sending out any sound waves to anyone out there? What if there's an alien planet who has a "seti" program looking for other life? Can they hear us? we did :) http://en.wikipedia.org/wiki/Arecibo_message http://en.wikipedia.org/wiki/Cosmic_Call http://en.wikipedia.org/wiki/Teen_Age_Message http://en.wikipedia.org/wiki/A_Message_From_Earth http://en.wikipedia.org/wiki/Across_the_Universe_(message) http://en.wikipedia.org/wiki/Hello_From_Earth
	ID: 953184 ·

Message boards : SETI@home Science : Is it true SETI is used to find aliens?