gedmark

8 ms·

31.
by gedmark 10y ago
Astranis (YC W16) | San Francisco, CA | Full-Time | Onsite | US Citizen or Green Card We’re building small, low-cost telecommunications satellites. Our mission is to help bring the 4 billion people online who are without internet. And to pu
32.
by gedmark 10y ago
Astranis (YC W16) | San Francisco, CA | Full-Time | Onsite | US Citizen or Green Card We’re building small, low-cost telecommunications satellites. Our mission is to help bring the 4 billion people online who are without internet. And to pu
33.
by gedmark 10y ago
Astranis (YC W16) | San Francisco, CA | Full-Time | Onsite We’re building small, low-cost telecommunications satellites. Our mission is to help bring the 4 billion people online who are without internet. And to pull it off we have to r
34.
KIC 8462852 Faded at an Average 0.165+-0.013 Magnitudes/Century from 1890-1989(arxiv.org)
15 points by gedmark 11y ago|0 comments
35.
by gedmark 11y ago
There's definitely a legal way to do it. You just tie federal dollars that flow down to local police to requirements for police training. It's the same way federal highway dollars are tied to standards for state driver's lice
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by gedmark 12y ago
Click-bait headline. The article is actually about Greg Wyler's WorldVu company. If you haven't gotten around the paywall yet, here's the key quote... "The people familiar with the matter cautioned the project is in a fo
37.
by gedmark 12y ago
Not sure what proper HN etiquette on this is, but I made a comment on the launch news story on this exact subject: https://news.ycombinator.com/item?id=8525057 TLDR- Those engines may be 50 years old, but they're a tec
38.
by gedmark 12y ago
I should have been clear on the propellant - the SSME is a hydrogen engine. For a lot of reasons, comparing engines of different propellants by using a single performance number alone doesn't make a lot of sense. But if you want to tal
39.
by gedmark 12y ago
Using 50 year old Russian engines was a risky move on Orbital's part, but in fairness the NK-33's are a pretty amazing piece of technology. The US has still yet to build anything matching its performance: http://en.wiki
40.
by gedmark 12y ago
Insane is a better word for it. Although to be fair there are a lot of aspects of the shuttle's design and operation that will be remembered that way. He even glosses over the SRB issue. Thanks to the SRB's, there were no abort mo
41.
The Engines That Came in from the Cold: How the NK-33 and RD-180 Came to the USA(youtube.com)
1 points by gedmark 12y ago|0 comments
42.
by gedmark 12y ago
"Unlike previous phases of NASA’s commercial crew program, which used funded Space Act Agreements that provided greater flexibility, the CCtCap awards are fixed-price contracts." http://www.spacenews.com/article&#x
43.
by gedmark 12y ago
It's pretty straight forward. SpaceX can do the same work with less money for a variety of reasons. And SpaceX has a capsule that has already flown in space and successfully docked with the ISS several times to deliver cargo. They are
44.
by gedmark 12y ago
Surprised this is the top comment. Your first link is reporting on an unrelated military program to replace the RD-180 rocket engine. The other four links are all blog spam using the same source: the Wall Street Journal article by Andy Pasz
45.
by gedmark 12y ago
The right answer is they should fund all three. That was the intention of the program from the beginning. This would likely look like two full awards and one "half" award that would be more of a technology development effort. The
46.
SpaceX Signs 20-Year Lease for Historic Launch Pad 39A(nbcnews.com)
2 points by gedmark 12y ago|0 comments
47.
by gedmark 12y ago
Just from what I've read - At 1st stage separation the F9 is going Mach 10 at an altitude of 80km. There's no hard and fast definition of how high/fast you need to be going for it to count as a "re-entry", but that
48.
by gedmark 12y ago
Just to set expectations, SpaceX has tried to recover the 1st stage of almost all of its launches to date. (Using just parachutes for most of them). They've yet to successfully recover a first stage. Their most recent test went pretty
49.
by gedmark 13y ago
> one way to deal with this may be to have engineering teams on stand-by, ready to helo to a broken drone ship and do repairs. Very few helicopters have a range >600 nm one-way. That puts a lot of places a ship could be in the shippin
50.
by gedmark 13y ago
Interstellar probes will get to be pretty cheap with sufficient economic growth. We should be able to easily afford >0.1c probes in 100 years or so on our current economic trajectory. And if our civilization advances for another 1000 yea
51.
by gedmark 13y ago
I was puzzled by this as well. I'm not familiar with a "wolf hypothesis" and a google search doesn't turn anything up. I'm pretty sure he's talking about the Zoo Hypothesis. i.e. our presence is known to other
52.
by gedmark 13y ago
Aerospace engineer here (now doing software stuff). Around the time I left my alma mater was doing a good job shifting to more courses that involved actually building hardware. Their term for it was DBT for "design, build, test."
53.
GoComm (YC S13) Takes On Yammer Mobile For Task Management, Event Coordination(techcrunch.com)
38 points by gedmark 13y ago|6 comments