Recent comments in /f/space
[deleted] t1_jdotdm5 wrote
Reply to comment by astro_pettit in My camera setup on the International Space station. More details in comments. by astro_pettit
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graphicsnerdo t1_jdot4yz wrote
Reply to comment by astro_pettit in My camera setup on the International Space station. More details in comments. by astro_pettit
That’s rad. Astronautphotographernaut!
Mr_nobrody t1_jdosqgm wrote
Reply to comment by astro_pettit in My camera setup on the International Space station. More details in comments. by astro_pettit
Wouldn't it be better to have the window open when taking the photos so the glare from the window isn't in the shot?
[deleted] t1_jdosm88 wrote
Reply to My camera setup on the International Space station. More details in comments. by astro_pettit
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astro_pettit OP t1_jdoslx4 wrote
Reply to comment by SDCgeeek in My camera setup on the International Space station. More details in comments. by astro_pettit
I captured the Transit of Venus across the sun in 2012, which occurs once every 100 years, and was lucky enough to be on station when it happened.
pocketMagician t1_jdosehs wrote
Reply to My camera setup on the International Space station. More details in comments. by astro_pettit
Amazing look at those lenses! Are all the cameras different? Which is your favorite?
DasbootTX t1_jdos8m5 wrote
Reply to [NASA on Twitter] Newly-discovered asteroid 2023 DZ2 will pass Earth more than 100,000 miles (161,000 km) away–about half the distance to the Moon–making its close approach at 3:51 p.m. EDT (12:51 p.m. PDT) by ICumCoffee
Well message from the future. Nothing happened
[deleted] t1_jdos173 wrote
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DoctorProfessorTaco t1_jdornit wrote
Reply to comment by sithelephant in [NASA on Twitter] Newly-discovered asteroid 2023 DZ2 will pass Earth more than 100,000 miles (161,000 km) away–about half the distance to the Moon–making its close approach at 3:51 p.m. EDT (12:51 p.m. PDT) by ICumCoffee
I think you mean 64x the radius of the Earth, not 1/64 the radius.
The radius of the Earth is 6,378km, I don’t think you mean that a circle with the diameter of the lunar orbit is 1/64 of that, or about 100km.
Additionally, even if you mean 64x larger, it’s still not quite correct. The average diameter of the lunar orbit is 768,000km. 1/64 of that is 12,000km.
What you probably meant to say was the average radius of the lunar orbit is approximately equal to 64x the radius of Earth, or that the radius of Earth is about 1/64 the average radius of the lunar orbit.
binzoma t1_jdord9w wrote
Reply to comment by assassin5 in [NASA on Twitter] Newly-discovered asteroid 2023 DZ2 will pass Earth more than 100,000 miles (161,000 km) away–about half the distance to the Moon–making its close approach at 3:51 p.m. EDT (12:51 p.m. PDT) by ICumCoffee
yes, but the probability of it hitting a population centre is VERY low. most of the world is water. most of the remainder is land that is farm/forest/desert/tundra
sergius64 t1_jdora6o wrote
Reply to Black holes may be swallowing invisible matter that slows the movement of stars by Maxcactus
They say it matched - but the rate was 50 times faster than the estimates. So does that really match?
Ooh-Rah t1_jdor9t7 wrote
Reply to My camera setup on the International Space station. More details in comments. by astro_pettit
Very nice! I can't wait to see the pics. Have you ever photographed anything that surprised you?
rocketsocks t1_jdoqzdo wrote
Reply to comment by Charming_Ad_4 in Rocket Lab targets $50 million launch price for Neutron rocket to challenge SpaceX’s Falcon 9 by cnbc_official
The DC-X was doing vertical landings in the '90s, Blue Origin has been doing vertical landings with their New Shepard since 2015. Yes, it's harder to do with a larger rocket but Rocket Lab is stacking the odds in their favor (by going for RTLS only, for example), and they have the benefit of watching SpaceX having done it.
When SpaceX began testing landings of the Falcon 9 they had a grand total of 7 successful orbital launches under their belt. Rocket Lab has done over 30 launches of the Electron and they have a tremendous amount of public knowledge to draw from. I wouldn't be at all surprised if they succeeded with landing on the first attempt.
Starship is a great design, but it's incredibly ambitious and will take a while to achieve maturity because of its complexity and ambition. Far too many people are riding the Starship hype train imagining that as soon as it achieves partial success with an actual launch they'll start launching commercial payloads a week later and retire the Falcon 9 the week after that.
[deleted] t1_jdoqphc wrote
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[deleted] t1_jdoqlm2 wrote
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SDCgeeek t1_jdoqc2s wrote
Reply to My camera setup on the International Space station. More details in comments. by astro_pettit
Very cool, thanks for sharing. Just curious, what was your favorite thing to photograph throughout your time in space and why?
xaeru t1_jdoq41e wrote
Reply to comment by insufficientmind in [NASA on Twitter] Newly-discovered asteroid 2023 DZ2 will pass Earth more than 100,000 miles (161,000 km) away–about half the distance to the Moon–making its close approach at 3:51 p.m. EDT (12:51 p.m. PDT) by ICumCoffee
What is the known threat past 100 years?
assassin5 t1_jdopod1 wrote
Reply to comment by [deleted] in [NASA on Twitter] Newly-discovered asteroid 2023 DZ2 will pass Earth more than 100,000 miles (161,000 km) away–about half the distance to the Moon–making its close approach at 3:51 p.m. EDT (12:51 p.m. PDT) by ICumCoffee
In which case it would be like dropping a nuke in New York, no biggie.
[deleted] t1_jdopd5n wrote
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__Augustus_ OP t1_jdoth9y wrote
Reply to 3 years ago I built this telescope in my parents' garage. It's since shown me supernovae, comets, 3 dwarf planets and been looked through by thousands of other people. by __Augustus_
Returning after 3 years. It may not look like it but this is the same telescope from here (and same haircut, lol). Lots of improvements including bigger bearings, new focuser, new truss clamps, a motorized EQ platform for tracking. 14.7" f/2.9 Dobsonian with a quartz mirror made by Steve Dodds. I have since built a number of telescopes up to 24" but this is once again my largest scope and I am beginning work on a 25" f/2.6 along with a 32" f/2.6 and 37" f/3, which I am grinding the mirrors for. I also regularly set up my telescopes for public outreach events including literally on street corners, and I am teaching friends to grind mirrors and make telescopes both locally and over the Internet. This scope has been to dozens of star parties and outreach events and still remains my favorite and it keeps getting better the more I tweak it.
Other than DIY astronomy stuff, I have no background in science or engineering, and I suck at math. Building one of these is not hard and it's a great way to get an affordable, not to mention custom instrument.
As always, if you're interested in buying or making a telescope I recommend /r/atming and /r/telescopes along with TelescopicWatch.com. You can build or buy a good telescope for as little as $130. The Hadley 114mm telescope is a lovely 3D-printed instrument you can easily make yourself for $150 or less.
Photo taken at the annual Stars Over Sabino event in Tucson, AZ.