Questions tagged [nasa]

The National Aeronautics and Space Administration is an United States government organization.

Filter by
Sorted by
Tagged with
0 votes
0 answers
11 views

How did the electronic components in Parker Solar probe responsible for controlling it and communicating with base station survive high temperatures?

The recent revelations by Nasa that their solar probe had been closer to the Sun by never before distances and aims at getting close to Sun by a mere 6.9 times radius of the Sun around year 2025. ...
user avatar
0 votes
1 answer
31 views

Doubt regarding the positioning of starshade in new world's mission of Nasa

The new worlds mission of NASA has an occulter with the telescope, Why did they place the occulter at a distance instead of attaching it to the telescope such that there is a hole as big as the size ...
user avatar
0 votes
0 answers
30 views

Gravity Probe B and the gravitomagnetic acceleration (frame dragging)

How could 1 gyroscope prove both the geodetic effect and the frame dragging? The geodetic effect is orders of magnitude greater than the "shadowed" frame dragging.
user avatar
0 votes
1 answer
29 views

Are there any plans for cosmic ray detectors as part of the new ARTEMIS program?

NASA's new Artemis program involves building several temporary waypoints around and on the moon. One of the side-bonuses for scientists is that this has opened a few new funding avenues for studying ...
user avatar
1 vote
2 answers
68 views

Can drag be neglected, although the object is in motion?

I was researching more about drag and why two things fall at the same time, and I came across Nasa's website (and quite a few more website) which said that, When drag is equal to weight, there is no ...
user avatar
1 vote
1 answer
52 views

Does the Parker Solar Probe experience radiation pressure being so close to the sun?

Since the Parker Solar Probe does close fly-bys around the sun, does it experience any significant radiation pressure from photons emitted by the sun? Is this push, significant enough to require ...
user avatar
  • 523
15 votes
3 answers
4k views

What does "rarely" mean in NASA's statement: "technically referred to as an exosphere because it’s so thin, its atoms rarely collide."?

The following statement is from this article: The behavior of a dense atmosphere is driven by collisions between its atoms and molecules. However, the moon's atmosphere is technically referred to as ...
user avatar
0 votes
1 answer
79 views

Why must interplanetary visible-light-wavelength laser communication beams be transmitted at very low power levels?

From the March 2021 Scientific American: Optics. Traveling Photons. A laser-based system could boost deep-space data transfer. 'Laser communication could work with receivers about 20 centimeters ...
user avatar
  • 3,515
1 vote
0 answers
17 views

How does the NASA InSight lander determine the depth of a Marsquake?

With only one lander with this type of equipment at one location, how can the InSight lander's investigators be so sure of the depth of the Marsquakes it detects?
user avatar
  • 3,515
2 votes
1 answer
118 views

How NASA scientists confirmed that the 'Pale Blue Dot', taken from Voyager, is earth? [closed]

It could be Mars or jupiter also? https://www.space.com/pale-blue-dot-earth-space-photo-remastered.html
user avatar
0 votes
0 answers
36 views

Method adapted by ISRO

Why does the ISRO change orbits of a satellite in many steps? I've seen them do this in the MANGALYAAN as well as CHANDRAYAAN II missions. From what I understand, changing the orbit of the ...
user avatar
2 votes
0 answers
158 views

NASA's "Impossible" Space Engine, Take Two [closed]

This question seems to be a close parallel of this one, but it's about a different design by a different author. I read a news article about a "helical engine" design by NASA engineer David Burns. ...
user avatar
  • 318
0 votes
1 answer
84 views

Free return trajectory versus burning rocket

It is said that Apollo was set to the free return trajectory while leaving earths gravity, heading to moon.Now the Free return trajectory is the one in which satellite uses moon gravity to return back ...
user avatar
0 votes
2 answers
47 views

What is actually breaking the ozone layer?

My question is about the ozone layer. Is it possible that sending rockets out to space can damage the ozone layer?
user avatar
  • 1
1 vote
0 answers
99 views

Diffusion of a color through a liquid in zero-gravity environments

There's a video of an astronaut putting a droplet of food coloring into a blob (sphere) of water on the ISS. The water turns the color of the dye almost instantaneously. On Earth that dye would slowly ...
user avatar
1 vote
1 answer
53 views

How does TESS focus on bright nearby stars?

How does the Transiting Exoplanet Survey Satellite "focus on" bright nearby stars, in contrast to the Kepler Mission's focus on dim distant stars? I understand that the fields of view of the two ...
user avatar
  • 4,872
2 votes
2 answers
182 views

Delta-V of Earth to Moon mission using Moon orbit

I have read this article here and it talks about the delta-v cost of travelling to and from the Moon. Importantly it says that getting to an orbit round the Moon, and docking with a space station, and ...
user avatar
  • 121
30 votes
1 answer
5k views

Why is Anti-helium so important in the search for dark matter?

I've been reading/hearing that if the AMS satellite measures a significant flux of anti-helium in cosmic rays, that would be an irrefutable proof of dark matter. I was wondering: Why is that? what is ...
user avatar
  • 860
-3 votes
1 answer
2k views

Why were rubber o rings used on challenger shuttle boosters? [closed]

From non engineering point of view I'd have so many problems with it that I'd call o ring design stupidity. Why use rubber? The gases are under high pressure and extremely hot! it'll always burn ...
user avatar
-1 votes
1 answer
83 views

Gold on NASA visor follow up?

I looking for ways to coat the lenses of my glasses with a thin layer of gold, the same way tht NASA used to do with the astronaut's visors. I found this post by Carlos: Why does NASA use gold foil ...
user avatar
-4 votes
3 answers
26k views

Why does NASA need an aircraft model flying over a flat and nonrotating earth?

On the NASA Technical Reports Server (NTRS) there's an article titled Derivation and definition of a linear aircraft model: Abstract A linear aircraft model for a rigid aircraft of constant ...
user avatar
0 votes
1 answer
129 views

Why does NASA choose Cape Canaveral to be the site to luanch the space shuttle?

I just wondering why this place precisely. Is it politics? And what happen to it now since the space shuttle program retired?
user avatar
1 vote
2 answers
3k views

Does the International Space Station always travels in the same path?

From the 3d visualization http://www.satflare.com/track.asp?q=25544#TOP (the right image with the red line indication the path of the ISS) it looks like always the ISS takes the same path. Is it the ...
user avatar
3 votes
1 answer
159 views

What happens when the Kepler Space Telescope 'catches up' to Earth?

Kepler is in an earth-trailing orbit with a period of 372.5 days, so it lags behind the Earth about a week each year. Doesn't that mean that, in about 52 years, we'll meet it from the other direction? ...
user avatar
-2 votes
1 answer
105 views

Is it true Mars once had life? (like Earth) [closed]

Nasa had proven Mars once had water and still has under ground. So dose that mean mars once had life or maybe still has?
user avatar
21 votes
2 answers
3k views

Land proportions in NASA blue marble photographs

What is the explanation for the apparent size difference of North America in these two photos from NASA? Image source Image source
user avatar
  • 363
2 votes
1 answer
768 views

How does NASA determine the position of their probes?

I'm currently following New Horizons visit to Pluto. I'm just wondering how does the Probe/NASA determine the Position of the Probe? I would assume using earth's GPS wouldn't have the necessary ...
user avatar
  • 436
6 votes
1 answer
176 views

ISS live stream 'experiments' explanation

I am not sure if this question would be appropriate on Physics.SE (or SE in general) so please redirect me if necessary. I have been recently watching some of the International Space Station live ...
user avatar
  • 421
2 votes
1 answer
199 views

How is possible to hear mechanical sounds in space?

In the footage taken by U.S. astronaut Terry Virts during spacewalk (EVA) on the International Space Station on 25.02.2015, sounds can be heard while in space. I can understand "shaking" sounds while ...
user avatar
  • 121
1 vote
0 answers
86 views

What are the evidences that support the EmDrive? [duplicate]

Firstly, I'd like to point that I’m from Brazil, so forgive me for any errors in my writing. Today, i found myself reading a journal who said that NASA is closer to detecting Warp Bubbles predicted ...
user avatar
0 votes
1 answer
314 views

Has the Pioneer Anomaly been experienced by Voyager?

I came across the Pioneer Anomaly recently, and a quick search here showed there now a theory that fits everything observed. My question is, should we expect a similar effect from the design of the ...
user avatar
1 vote
1 answer
348 views

Are the Voyager spacecraft rotating in space or are they completely still?

Are the Voyager spacecraft completely still (fixated) when travelling through space or are they a little unstable because they are travelling at high velocities?
user avatar
  • 39
1 vote
2 answers
339 views

Exotic matter out of a "squeezed" vacuum?

In the light of the current warp field experiments by NASA I found this paper: https://arxiv.org/abs/1005.5682 Could this actually lead to the creation of exotic matter or at least strengthen the case ...
user avatar
2 votes
1 answer
216 views

"Voyager: Lightning on Jupiter": what's a sound source for this?

NASA created an official Soundcloud channel with a various sounds from missions. There are a Voyager: Lightning on Jupiter sound. Is there are ay information on how's this sound is produced (and ...
user avatar
  • 949
3 votes
1 answer
135 views

Why was the asteroid 101955 Bennu chosen by the NASA OSIRIS-REx sample return mission?

Please explain it in simple terms. Why was THIS asteroid chosen among all the thousand of asteroids?
user avatar
3 votes
1 answer
1k views

question about ICRF/J2000 equinox orientation

The DE406 ephemeris data and the NASA Horizons website all report the Earth's current coordinates on 2014 Sep 27, a few days after the Fall equinox, as approximately [1,0,0] AU. However every ...
user avatar
5 votes
1 answer
441 views

NASA Theoretical Faster Than Light Space Travel (IXS-Enterprise)

I was recently reading about NASA Faster than Light proposed spaceship, it supposedly will bend spacetime behind the spacecraft, so technically instead of bringing the ship to the destination, "it ...
user avatar
16 votes
3 answers
4k views

Is it possible to avoid the radiation that caused the American flag turned into white on the Moon? [closed]

While lunar images have proven that the American flags planted during the Apollo missions are still standing on the moon, lunar scientists have now said that they probably no longer hold the iconic ...
user avatar
1 vote
2 answers
3k views

Curiosity Rover (MSL): current coordinates

I'm looking for information on the current coordinates of Mars Science Laboratory's Curiosity Rover. I've only found the landing site coordinates 4.5895°S ...
user avatar
  • 422
1 vote
2 answers
140 views

Could a spacecraft dock with the voyager 1?

Is the Voyager 1 (or any similar exploration spacecraft) equipped with the ability for space to dock with it (attach to it)? Hypothetically, if a voyager or similar spacecraft were in Earth's orbit, ...
user avatar
  • 11
0 votes
1 answer
171 views

How could the relative zero gravity of the International Space Station be canceled? [duplicate]

Possible Duplicate: Will a machine or a technique ever be possible that allows gravity in space? I'm wondering how it would be possible for science to cancel out the experience of zero gravity on ...
user avatar
  • 11
7 votes
4 answers
660 views

How do aerospace engineers choose a landing system? (Curiosity rover)

The Sojourner rover with the Mars Pathfinder used a entry, descent, and landing system involving airbags to land on Mars. The Spirit and Opportunity rovers each used more-or-less the same system ...
user avatar
10 votes
2 answers
6k views

What happened to Apollo's Saturn-third-stage rockets?

I read recently the original Apollo 11 press release and it mentions that the Saturn V's third stage (used for Trans-Lunar Injection) was deployed into a solar orbit of some kind: (Source: Press Kit -...
user avatar
3 votes
1 answer
141 views

Cassini: What information could be gained from the 2017 impact with Saturn?

First of all: Will Cassini be operational in 2017 (pending no unforeseen equipment failures)? Power Communications ... What information could we gain? Properties of Saturn How to build more ...
user avatar
8 votes
2 answers
5k views

Where are the Voyagers going?

Given enough time, where are the Voyager spacecrafts heading? (Assuming some alien civilization doesn't pick them up.) Will they pass by any interesting stars on the way to the black hole at the ...
user avatar
  • 801
0 votes
1 answer
61 views

Where to get hard historical and trend data related to reentry of satellites like UARS [closed]

NASA is providing very brief updates on the reentry of the UARS satellite. They also published an extensive study of the Re-entry and risk assessment for the NASA Upper Atmosphere Research Satellite (...
user avatar
  • 441
7 votes
2 answers
386 views

How can Y-dwarf stars have such a low temperature?

A recent article from NASA said they found some stars with temperatures "as cool as the human body." How is this possible? Does fusion still occur in these stars?
user avatar
4 votes
1 answer
170 views

What is the mass of the LEGO figurines being launched with spacecraft Juno?

What is the mass of the LEGO figurines being launched with spacecraft Juno? How much additional fuel will be needed to get them to Jupiter?
user avatar
  • 4,872
6 votes
2 answers
1k views

Why aren't space probes like New Horizons sped up in space?

So the New Horizons project is sending a probe out to image Pluto and Charon. As they're pretty far away, it will take the New Horizons probe nearly 10 years to get there (in 2015, having been ...
user avatar
3 votes
1 answer
165 views

What effects will the heliosheath have on the Voyager spacecraft?

I wanted to know what effects the heliosheath will have on the Voyager 1 & 2 craft. I know they used the slingshot method to travel through our solar system; so, with being way out in the ...
user avatar