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Questions tagged [time]

How passage of time impacts space exploration activities.

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2
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1answer
143 views

Tesla Near Mars Orbit

When will the Tesla Roadster come into a near Mars orbit as shown in the SpaceX simulation shown in Elon Musk's tweet? Is it 10 years, 20 years or when?
2
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1answer
75 views

What time is NASA using for Horizons web output?

Here's an example of some output from JPL's Horizons web interface. NASA does not (appear to) specify which GMT is at those hours that the specific transits occurred, or at least I can't find it. ...
2
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1answer
178 views

Converting UT1/UTC to Julian Date

I am reading about the algorithms to convert from date and time format to Julian Date from the Fundamentals of Astrodynamics and Applications by Vallado (4th Edition) p183. My question is ...
1
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4answers
2k views

Where can the term “Sol” used?

Alright, I know that "Sol" is used on Mars to count days. But is the sun called: "Sol"? And can you use that term on Earth as well? The reason for the question is that the term "sol" is used in two ...
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2answers
82 views

What is the date for a Mars file?

When a robot on Mars does something like take a picture, how does it date that file? I imagine that the responsible laboratory is a possible referential, correct? Is it possible / does it make sense ...
1
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1answer
464 views

Do the Voyager probes experience time moving faster due to relativity?

Time goes faster the weaker the gravitational field you are in as long as your velocity is constant. The Voyager probes have moved a long way from the sun and its planets so I presume time must be ...
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2answers
386 views

What is the delay of the YT live stream for ISS?

On YT, we can see a live stream from ISS. What is the delay here (given you have a modern high speed internet access)?
1
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1answer
177 views

Time dilation between Earth and a similar planet revolving around a supermassive Black hole [closed]

I was thrilled watching 'Interstellar'. It was only much later that I came to realize certain anomalies in the movie (like the scene in which McConaughey approaches the Gorgantua — his body ...
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0answers
233 views

Backwards time dilation paradox [closed]

We have a pair of atomic clocks. Let's call them clock A and clock B. We switch both of them on at the same time. Clock A will stay on Earth and clock B will go with the astronauts. Astronauts with ...
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0answers
37 views

How long to surpass Voyager satellite distances using modern technology? [duplicate]

NASA's JPL just recently acknowledged that Voyager II has now joined Voyager I in entering interstellar space after 41 years of space travel. This got me to wondering: when will we ever get to Alpha ...
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0answers
103 views

Which one is older light or stars? [closed]

I kind of feel that light is older than stars. But is there any scientific theory or hypothesis on it?
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2answers
96 views

What is a safe speed in space for spacecraft?

Does traveling fast as possible shortening the duration of the mission lessen chances of collision or mechanical failure, or does traveling slower in space in some way safer?
0
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1answer
623 views

how much does time slow down with gravitational time dilation, on a black hole with these graph trajectories.? [closed]

How much does time slow down with gravitational time dilation, on a black hole with these graph trajectories.? If you watch a journey into a black hole on Youtube before reading this question, it ...
0
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1answer
163 views

Constant Acceleration in Space. How much time for a given distance?

I have been researching a lot and can't make any sense of it all, so I am trying my luck here. I want to program a simple formula that gives me the travel time in space. I have a constant thrust of ...
0
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2answers
101 views

Time when traveling around the speed of light [closed]

I heard that if you travel at the speed of light or faster (say, to the Kelper systems ) and come back, thousands of years may have passed but you haven't experienced more than a few. How is this ...
0
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1answer
138 views

What would happen to perceived time in this scenario?

This is difficult for me to explain, but hopefully I can get my question across... Let's say there is a planet called Planet X one million light years from Earth (there probably is). Let's also say ...
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1answer
2k views

How long does it take for a satellite to reach MEO? [closed]

I'm just wondering how long it takes satellites from launch to orbiting in MEO.
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1answer
378 views

Local Time Calculation

How To Calculate Local Time Of A Sun Synchronous Orbit With A Given Altitude ( Say 600 km ) , Inclination ( 98 degrees ) ?
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1answer
495 views

Considering the relativity of time, how is time experienced in deep space? [closed]

To be more specific, if the relativity of time is governed by the mass and gravity of objects (I.E the satellites orbiting earth experience minor time dilation compared to us on the ground), how is it ...
0
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1answer
213 views

Theoretically, could gravitational time dilation ever be an issue when visiting an alien planet?

If humanity ever got to the point of being able to explore new planets (assuming we could land there), are there any known entities in the universe that are so massive that gravitational time dilation ...
-1
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3answers
181 views

Juno to Jupiter Budget

Would the Juno program be more cost effective if the spacecraft took a direct flight to Jupiter rather than using gravitational pull from planets, which took nearly 5 years instead of say, 2 years? ...
-2
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1answer
147 views

Can we displace earth? [closed]

From the gravitation equation it is clear the earth gets pulled but we fall due to negligible mass. But, if each and every person on the earth takes a jet-pack and jumps to a height equivalent to 20 ...
-4
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1answer
134 views

2 Hubble telescopes looking at each other for a world CCTV? [closed]

As technology progresses could something like a Super Hubble see satellite the Earth to have a time delay to have any use? Super Hubble A (or a huge mirror) is 30 light minutes away looking at Earth ...