by De58te » Fri Jul 13, 2018 6:15 am
RocketRon wrote: ↑Fri Jul 13, 2018 5:32 am
APOD Robot wrote: ↑Fri Jul 13, 2018 4:07 am
Bracewell's array was used to contribute data to plan the first Moon landing, [/url].
Can anyone expand on this ?
Interesting topic, can't imagine there are too many 'star' dials ?
Certainly solves the problem that the sun doesn't shine at night.
And there would be no analemma/equation of time to complicate things...
From Wikidedia; "At Stanford Professor Bracewell constructed a microwave spectroheliograph (1961), a large and complex radio telescope which produced daily temperature maps of the sun reliably for eleven years, the duration of a solar cycle. The first radio telescope to give output automatically in printed form, and therefore capable of worldwide dissemination by teleprinter, its daily solar weather maps received acknowledgement from NASA for support of the first manned landing on the moon. "
Well, if I recall NASA had two life threatening concerns. Aside from running out of oxygen, failing to enter Moon orbit and shooting past it forever into space, and after Apollo 13, rockets exploding, and burning up in Earth reentry. Well actually there were dozens of concerns, but two concerns regarding space radiation. Sailing through the Van Allen Radiation Belts, and, the Sun emitting a deadly solar flare while the astronauts were on the Moon.
[quote=RocketRon post_id=284043 time=1531459949]
[quote="APOD Robot" post_id=284042 time=1531454861 user_id=128559]
Bracewell's array was used to contribute data to plan the first Moon landing, [/url].
[/quote]
Can anyone expand on this ?
Interesting topic, can't imagine there are too many 'star' dials ?
Certainly solves the problem that the sun doesn't shine at night.
And there would be no analemma/equation of time to complicate things...
[/quote]
From Wikidedia; "At Stanford Professor Bracewell constructed a microwave spectroheliograph (1961), a large and complex radio telescope which produced daily temperature maps of the sun reliably for eleven years, the duration of a solar cycle. The first radio telescope to give output automatically in printed form, and therefore capable of worldwide dissemination by teleprinter, its daily solar weather maps received acknowledgement from NASA for support of the first manned landing on the moon. "
Well, if I recall NASA had two life threatening concerns. Aside from running out of oxygen, failing to enter Moon orbit and shooting past it forever into space, and after Apollo 13, rockets exploding, and burning up in Earth reentry. Well actually there were dozens of concerns, but two concerns regarding space radiation. Sailing through the Van Allen Radiation Belts, and, the Sun emitting a deadly solar flare while the astronauts were on the Moon.