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Questions tagged [solar-system]

Refers to questions concerning the solar system containing Earth. For other solar systems, use the 'planetary-system' tag.

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When will we land on other planets in our solar system? [closed]

It seems like NASA wants to put someone on Mars by 2030, 61 years after we first landed on the moon. This date doesn't seem too far off. However, will it take another 60 years or more to reach the ...
Nitrogen-8's user avatar
9 votes
1 answer
1k views

Why is there no difference between a transfer orbit delta-V and a capture orbit delta-V for Earth?

I'm particularly interested in understanding this beautiful solar system delta-v map and concepts on its Wikipedia page. In contrast to other planets there is no Earth Transfer only an Earth Capture/...
Galerita's user avatar
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3 votes
3 answers
2k views

Why didn't NASA launch communications relay satellites outside the asteroid belt to communicate easily with interstellar satellite?

I came across with nasa's voyager and other interstellar satellite, just thought that if they build a relay satellite which situated outside asteroid belt or nearby to Saturn & Jupiter, to ...
Ashay baghele's user avatar
1 vote
0 answers
63 views

Diameters of moons in solar system

I would like to programmatically find all moons in our solar system above a certain diameter. I would like to use the api to jpl horizons if possible. (For context I am then going on to find ...
Cortado-J's user avatar
  • 111
4 votes
2 answers
138 views

Cost and quantity of space mission in 2020s vs 1980s?

Today we have 50 times as many satellites in orbit as in the 1980s and the price of space equipment has come down; however, we have a thousand times fewer satellites orbiting far away space bodies ...
bandybabboon's user avatar
14 votes
1 answer
2k views

How likely is it that the Voyager spacecrafts haven't yet been damaged by micrometeoroids?

Both Voyagers have been traveling at over $60,000$ km/h for well over four decades and still seem to function properly, taking into account the slowly dropping power and warmth available from their ...
Tfovid's user avatar
  • 243
7 votes
1 answer
1k views

How do we define the aphelion of Earth?

After seeing this question, I was curious on how we define the aphelion of Earth. On a quick search it said that the aphelion is the point when Earth is the furthest way from the sun. However, all the ...
The Rocket fan's user avatar
0 votes
1 answer
150 views

What's the orientation of earth in space if the entire solar system is moving in one direction [closed]

I know that there is nothing north, south, east or west in space there is no reference by which you can tell if apparent north is up, down, left or right. But as I understand that all planets in the ...
Himanshuman's user avatar
2 votes
3 answers
851 views

How can you warm up Mars?

Mars experience extreme temperatures. Highest temperature being 21 degree celsius. So if we are to terraform mars one day then we first need to warm it up. So any ideas on how to warm up mars?
Joydeep Mohanto's user avatar
11 votes
5 answers
3k views

What processes create an object with an interstellar velocity?

An object like Oumuamua originates in a solar system. This object has roughly the inertia of everything else there. I can imagine stuff on the edge of the accretion zone for a star that...WANDER off......
Chris B. Behrens's user avatar
15 votes
2 answers
2k views

By when can we pass by Voyager 1?

I am just curious to know if there is any estimation, no matter how rough it could be, about when another human artifact can go farther than Voyager 1 with respect to the Earth; years, decades, any ...
Mehdi Abbassi's user avatar
1 vote
2 answers
130 views

Any star-system list indexed by proximity?

Does anyone know where I can find a list indexed by Earth-proximity with all the star-systems or exo-planets with appropriate conditions for human direct exploration? It is not necessary to have ...
user406126's user avatar
5 votes
1 answer
216 views

Precision in the space navigation [duplicate]

I am curious about the precision NASA and other agencies have in the space navigation. Are they always accurate to the meter in position they aim for; in mission like the recent rover landing on the ...
Majoris's user avatar
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3 votes
1 answer
179 views

How many solar system bodies have "knees" in their atmospheres?

Discussion lead to citing Why does Earth's atmospheric density have a big "knee" around 100 km? Is there a good analytical approximation? who's answer is "monatomic oxygen". ...
uhoh's user avatar
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4 votes
1 answer
320 views

Is there an established name for the regions "above" or "below" the ecliptic plane in our Solar System?

In our Solar system, all of the planets orbit the Sun along a plane known as the ecliptic. If we extend the ecliptic plane into a sphere of the same radius centred around our Sun, is there any ...
SimonT's user avatar
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23 votes
5 answers
6k views

Can a moon orbit its planet faster than its planet rotates?

Can a moon orbit its planet faster than its planet rotates? Can a moon orbit its planet more than once per the planet's day? It seems possible but I'm not sure. Are there any known examples of this ...
user38319's user avatar
  • 255
3 votes
1 answer
144 views

What is "Planetary Defense", and what are the threats one can potentially defend against?

The planetary-defense tag has the current (my) awkwardly-written description. related to the defense of a planet from a major destructive event such as an impact, or searches for or studies of ...
uhoh's user avatar
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4 votes
1 answer
132 views

Is pulsar timing a viable positioning system for solar system missions

I was reading one of the questions about a version of GPS around Mars, and I started wondering about a Solar system wide positioning system -- large satellites with accurate clocks and powerful ...
Steve Linton's user avatar
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2 votes
0 answers
80 views

Is it true that we see the center of the milky way only half of the year? [closed]

Edit I copied the question to the Astronomy site (https://astronomy.stackexchange.com/questions/36947/is-it-true-that-we-see-the-center-of-the-milky-way-for-only-half-of-the-year), as suggested in one ...
riorio's user avatar
  • 515
10 votes
5 answers
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How does a planet's gravity push away smaller bodies that would otherwise intersect its orbit?

I was reading an article about dwarf planets online where I stumbled upon the following definition of a planet: The International Astronomical Union defines a planet as being in orbit around the ...
Learner's user avatar
  • 109
1 vote
1 answer
194 views

Locations of the terminator on Mars' surface on 1976-07-24T10:35:26Z?

How can I find points of latitude and longitude on Mars that fall on the terminator (day/night line) on a specific date, for example 1976-07-24T10:35:26Z as ...
uhoh's user avatar
  • 149k
2 votes
1 answer
169 views

Are planet orbits available to download in some vectorial format file?

I would like to work with solar system planet orbits in a Geographic Information Software like QGIS, so: Are available to download the orbits of solar system planets in some vector format? EDIT: ...
Pin's user avatar
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1 vote
0 answers
246 views

moon's true anomaly at date of new moon

I've seen on this site: https://eclipse.gsfc.nasa.gov/SEhelp/moonorbit.html a table that gives the true anomaly of the moon at the time of new moon. The difference between the true anomaly at one new ...
user34789's user avatar
5 votes
2 answers
615 views

Is the Heliosphere as elliptical as this graphic suggests?

I noticed the following graphic being used in an article discussing the Voyager probes. It also appears on Wikipedia's Heliosphere page: The same page states that: On a broader scale, the motion ...
aroth's user avatar
  • 667
2 votes
1 answer
190 views

Which solar system objects could a space elevator be built on with modern tech?

Which solar system objects have the right combination of low gravity and fast spinning rate, that an object tall enough to be a space elevator could be built on with modern construction tech? By "...
Ingolifs's user avatar
  • 6,458
18 votes
5 answers
920 views

What target is the most difficult to reach in the solar system?

"Most difficult", as in the minimum $\Delta v$ required, the objective being capture into an orbit around the object. Looking through some Delta-v maps, I would suspect the answer to be some inner ...
SE - stop firing the good guys's user avatar
1 vote
1 answer
96 views

What is the heaviest chemical element that has been recovered from beyond cis-lunar space? [closed]

Material has come to Earth from deep space (beyond cis-linar) and been subjected to scientific analysis both in the form of meteorites, and via robotic sample collection spacecraft and robotic ...
nexoma's user avatar
  • 111
6 votes
3 answers
5k views

Where will we get nitrogen in space?

It's expensive to launch things out of a gravity well. So in the future, as we seek to manufacture things in space, it's worth exploring the possibility of harvesting them there as well. In the ...
DJG's user avatar
  • 804
3 votes
1 answer
146 views

Why does my Saturnian System simulation "rotate" over time?

I am attempting to create a "top-down view" of the Saturnian System, using the Keplerian Elements + Rates provided here: https://ssd.jpl.nasa.gov/?sat_elem#saturn To verify the validity of my ...
sloesp's user avatar
  • 195
15 votes
4 answers
5k views

What is the most fuel efficient way out of the Solar System?

I understand with current technology we can't just fly a straight line out of the solar system but which way out would need the least fuel? Currently to navigate the solar system it is a dance ...
Muze's user avatar
  • 1
2 votes
1 answer
226 views

Highest velocity impact between a spacecraft and a solar system body? What about for a dedicated impactor (spacecraft component)?

In this answer I mention the proposed impact of DART: Double Asteroid Redirection Test (DART) Mission Double Asteroid Redirection Test The Double Asteroid Redirection Test (DART) Element of the ...
uhoh's user avatar
  • 149k
29 votes
6 answers
9k views

Why are probes that tend to explore outer system always launched to go outwards instead of straight upwards or downwards?

Let's take a look at the trajectory of variety probe missions. New Horizons and Ultima Thule will be 4.1 billion miles away when it visits the Kuiper Belt object. This chart shows the path of New ...
not_Prince's user avatar
  • 1,507
-2 votes
2 answers
89 views

Space Travel Advanced Recon [closed]

Could a network of probes be sent ahead of a mother ship to form a grid to lay a path for travel inside the solar system? After what certain speed anything larger then a stationary pebble could be ...
Muze's user avatar
  • 1
5 votes
1 answer
271 views

What words are used to mean in relation to or origin of a planet?

Pretty simple question I think, but I am having trouble confirming a legitimate answer. If things related to Mars are Martian, things related to Jupiter are Jovian, and things related to the Moon ...
TitaniumTurtle's user avatar
10 votes
3 answers
4k views

Is Voyager 2 capable of proving the existence of Oort cloud?

Yesterday on Dec 10 2018, NASA announced that Voyager 2 probe has exited the heliosphere - the protective bubble of particles and magnetic fields created by the Sun and entered the interstellar-medium;...
not_Prince's user avatar
  • 1,507
3 votes
4 answers
831 views

Why do some scientists want a moon base for further space travel? What are the advantages of a moon base if compared with an earth base?

The distance between moon and earth is just 384,400 km. So, if we can travel (from moon) to another planet, we also can travel (from earth) to the same planet. But I've read that some scientists want ...
Harry's user avatar
  • 55
5 votes
1 answer
353 views

Which planet gets the most money? Which gets the least?

I'm curious if anyone has ever tallied the expenditures of all of the world's space programs, and then tried to divide it by which planet was targeted. It's possible this has already been done. If ...
uhoh's user avatar
  • 149k
7 votes
2 answers
849 views

How was the radius of Venus measured so accurately (± 3 km) via radar in the mid 1960's, before Venera 4 and Mariner 5?

In several answers to the question When did planetary scientists realize Venus' surface pressure was almost 100x that on Earth? How did they find out? the known radius of Venus is mentioned. It was ...
uhoh's user avatar
  • 149k
28 votes
1 answer
11k views

What is the farthest artificial satellite in orbit in our solar system?

When did we send the farthest satellite and what is its role and name ?
Taher's user avatar
  • 1,057
2 votes
1 answer
91 views

Plotting error values between simulated and JPL data

I'm attempting to compare values between my simulated data for the solar system and the official JPL data, to find errors for the position, velocity, inclination and azimuth. The simulated data was ...
Tarius's user avatar
  • 163
2 votes
0 answers
727 views

How to get the coordinates from NASA JPL Ephemerides DE430 ( ECRS) to ECI?

I'm trying to make a software that determines the orbit of a satellite which is affected by the Sun and Moon. The coordinates [x y z] that I have for the satellite are in Eci. For the position of the ...
Alexandru Lapusneanu's user avatar
4 votes
0 answers
177 views

Variation in Earth's aphelion and perihelion

I see from Astropixels.com that Earth's aphelion and perihelion each vary by a little over 29,000 km, while the earth-moon barycenter wobble is about 4,000 km. Is Astropixels.com correct? Are Jupiter ...
user16692's user avatar
  • 109
0 votes
2 answers
1k views

Are any of the planets in our solar system (other than Earth) inhabitable?

I've watched a TV series on a group of people that build a community on our neighboring planet, Mars, and after watching it, I started to wonder: Could something like this really happen in the near ...
Eevee's user avatar
  • 137
6 votes
0 answers
117 views

Any algorithmic models of our solar system to predict positions relative to earth?

I'm looking for a map/model of the movements of our solar system and associated moons. What are the 'best' algorythmic models to represent our solar system. Looking to write a game/edutainment app ...
CodingMatters's user avatar
4 votes
1 answer
258 views

Is there a planet walk with the positions of Voyager 1 and 2?

There are a lot of walks like the Sagan Planet Walk (see the list on Wikipedia). But are there any of these walks that include the position of the Voyager space probes? Some days ago I was ...
Uwe's user avatar
  • 49k
1 vote
1 answer
335 views

Does Sunlight have a range? [closed]

If you switch on a lightbulb in a room its light has a visible range. So how about Sunlight? Does it light more on Mercury and less on Pluto? And what about planets that are not in the Solar System?
Prolog's user avatar
  • 113
9 votes
2 answers
1k views

How many satellites would be required for Solar System GPS?

GPS is a Global Positioning System. it uses satellites in orbit to identify precise location on a globe. Several posts here talk about it being used in Low Earth Orbit (LEO) with success. About 30 ...
James Jenkins's user avatar
13 votes
1 answer
4k views

What does "side view" of solar system look like?

I'm trying to grasp what a 2D "side-view" of the solar system looks like. There are many examples of a "top-down" view of the solar system. But the side-view confuses me somewhat. ...
sloesp's user avatar
  • 195
2 votes
2 answers
142 views

What science could be performed by an extra-solar probe?

An earlier question asked whether there were any planned missions outside the solar system, which made me think of this question. What would the scientific benefits be in sending a probe outside the ...
GdD's user avatar
  • 20.3k
1 vote
1 answer
165 views

Are there any planned missions for spacecraft leaving the solar system? [duplicate]

We have some spacecraft that have extended missions outside of the solar system (ie voyager), but are there any plans for new spacecraft that will leave our solar system either by a primary or ...
David says Reinstate Monica's user avatar