In this week's questions show, I explain why I don't think we always need to be realistic, if galaxies in the local group are bound together gravitationally, and what we should call Earth-moving equipment on Mars.
00:20 Be realistic.
04:24 Are galaxies in the local group bound?
05:56 Will gravitational waves give us advanced notice of collisions?
08:36 Will we ever be able to live outside on Mars?
10:16 Are we going to ruin Mars too?
12:42 Mars-moving equipment?
14:07 Could the Moon have an atmosphere?
15:51 Liquid water on the surface of Mars
16:49 Is there a business case for Mars?
19:17 What about nitrogen?
21:21 What will need to come from Earth?
23:06 Are there planets with less gravity than Earth?
Want to be part of the questions show? Ask a short question on any video on my channel. I gather a bunch up each week, and answer them here.
Our Book is out!
https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/
Audio Podcast version:
ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2
RSS: https://www.universetoday.com/audio
Weekly email newsletter:
https://www.universetoday.com/newsletter
Weekly Space Hangout:
https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/
Astronomy Cast:
https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg
Support us at: https://www.patreon.com/universetoday
More stories at: https://www.universetoday.com/
Twitch: https://twitch.tv/fcain
Follow us on Twitter: @universetoday
Like us on Facebook: https://www.facebook.com/universetoday
Instagram - https://instagram.com/universetoday
Team: Fraser Cain - @fcain / [email protected]
Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw
Chad Weber - [email protected]
Support Universe Today podcasts with Fraser Cain
One second launch window? Holy tiny timeslice Batman!
Another GIGANTIC waste of money by NASA ! ! ! !
Another GIGANTIC waste of comment by TROLLING ! ! ! !
[Following the articles and googling the rest, it is easy to see that GRAIL is set to research the formation history of the Earth-Moon system, which is important to understand the general formation of terrestrial exoplanets but also the specific conditions for abiogenesis on Earth.
Current data compresses the formation of Earth crust and abiogenesis into slots of at most a few hundred million years and, more likely IMO, a few tens of million years. The later is doable but means tightly constraining processes (which is good for science!
All hail GRAIL! I am really looking forward to see these vital results in a few years.]
I’m always amazed at how many people fail to understand just how much good NASA spending does for the US economy, tech-base, and scientific knowledge in general. I’d rather cut welfare than science and NASA spending.