I experience time drift with devices not connected to NTP like cheap stopwatch/microwave clock/etc, but my all my devices connected to NTP stay synced on their own. For example: - my Windows time settings says: "Last successful time synchronization: 3/7/2024..." (This ~41 hours ago and not manually triggered.) - https://time.is/: "Your clock is 0.4 seconds ahead." I'm a little surprised there is a 0.4 second... - Source: Hacker News / 4 months ago

It's my first quartz watch and I love it to bits! Made me realize that the accuracy of a quartz movement is no joke. I knew nothing much about watches until I started this hobby back in September, and I've still got lots to learn! But from the little I've learned so far, lots of videos say how accurate quartz is, but I didn't realize how accurate it was until I was cleaning some of my mechanical watches. Seikos, a... Source: 7 months ago

Hi all! Need advice to buy a new trail bike 140 fr/140 back, under 2500 $. On all I need an XL size as I'm 1.96cm and 97kg. Mostly I will do soft trails and maybe in 1 or 2 years after I will progress some harder ones.Maybe is better to buy a cheap one then upgrade over time.is is really that good the fork on the h10 Fox 34 Float Performance 140 3-Position vs the h30 Marzocchi Bomber Z2 140 ? Source: 7 months ago

Was wondering, because I put my mechanical watch and digital correct to the second via time.is , how people years ago had to correct time differences? Source: 9 months ago

I just tested it against https://time.is on my cell phone (using wifi calling because network strength is abysmal where I live). I don't have a precise measurement but it was imperceptibly close, within 100ms probably. Certainly close enough to set a clock for non critical purposes. - Source: Hacker News / 9 months ago

Pretty much everything beyond our solar system is essentially fixed on a human timescale. Over 2000 years, a typical star will move about half a degree. That's the width of the moon in the sky. There are of course notable exceptions like Barnard's Star, whose movement is pretty obvious on photographs taken over several decades. If you want to explore how space changes over time, I recommend you look into... - Source: Hacker News / 21 days ago

I think Celestia could be a good one. I also thought about SpaceEngine, but AFAIK it was kind of terrible at generating realistic planetary systems, among other things (pricey, huge, etc.). Source: over 1 year ago

Celestia was something I played with before. Pretty interesting. Source: over 1 year ago

Celestia looks as though it would do it. Source: over 1 year ago

I'm looking for data and software to visualize the Apollo 17 trajectory (especially the "powered descent", lunar rendezvous and entry). I'm thinking of using celestia. I'm look for a data tables as well (time stamp, position for each part of the stack). Any tips are appreciated. Source: over 1 year ago