1.0Parabolic Archttps://parabolicarc.comNASA's Constellation Program: The Back Story....rich600338<blockquote class="wp-embedded-content" data-secret="Dp2xwAgjJ2"><a href="https://parabolicarc.com/2010/02/09/nasa-hsf-bit-history/">NASA’s Constellation Program: The Back Story….</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://parabolicarc.com/2010/02/09/nasa-hsf-bit-history/embed/#?secret=Dp2xwAgjJ2" width="600" height="338" title="“NASA’s Constellation Program: The Back Story….” — Parabolic Arc" data-secret="Dp2xwAgjJ2" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
/* <![CDATA[ */
/*! This file is auto-generated */
!function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document);
/* ]]> */
</script>
A brief review of recent NASA history might be instructive in understanding what the Obama Administration wants to do with the space program. The rationale behind the human spaceflight plan is pretty simple, actually. Much of it is getting lost in the thicket of details.https://parabolicarc.com/wp-content/uploads/2009/11/moon_rise_half1.jpg