Questions tagged [james-webb-space-telescope]

Filter by
Sorted by
Tagged with
3
votes
0answers
58 views

How do JWST and Hubble compare in detecting small bodies in the solar system that are a) white, b) black, c) Arrokoth-like, d) Voyager-like?

Assume the object is small, spherical, and illuminated only by the Sun, and has some apparent motion. The object is either: a) white - reflecting 100% perfectly diffusely (assume low temperature) b) ...
6
votes
1answer
425 views

When is JWST's first light?

Is there an official estimate when the first light of the James Webb Space Telescope happens? I keep following the press releases from ESA and NASA, but I cannot recall that I saw any on that topic. ...
7
votes
2answers
932 views

Which JWST instrument modes are compatible with observations of the bright trans-Earth planets Mars, Jupiter, and Saturn? Which aren't?

My comment says: ...answers to the Space SE question Can James Webb take pictures of our solar system? In what ways will they differ from/compliment those from Hubble? suggest that at some point JWST ...
6
votes
2answers
103 views

Will the James Webb Space Telescope need re-alignment of primary mirror segments?

I couldn't find an answer to this question. James Webb Space Telescope will align primary mirror segments and secondary mirror in space. Question is whether these will need re-alignment during the ...
5
votes
2answers
145 views

Question: By design, JWST cannot observe in the anti-sun direction. Is this due to Gegenschein backscatter?

This question has been reposted from Space Exploration Gegenschein is a faint bright spot in the zodiacal light, centered at the antisolar point. By ESO/Y. Beletsky - ESO, CC BY 4.0, https://commons....
4
votes
1answer
205 views

How clear will the images taken by the JWST be, compared to the rest of the telescopes?

How clear will the James Webb Space Telescope images be compared to other telescopes? I mean mainly for things like: Pluto, Eris, Haumea, Makemake, or Quaoar Ceres, Juno, Vesta or Astraea exoplanet ...
0
votes
3answers
596 views

How to fix James Webb space telescope?

(Please excuse my English) The James Webb space telescope(JWST) will be launched in 11 days. I've always wondered, how do we fix the JWST if it breaks? The JWST will be too far away. According to ...
3
votes
0answers
26 views

What is the fraction of the time that the JWST could view a short transient event on-demand as a function of position on the celestial sphere?

In this answer to Why does JWST have such a big Blind Spot? I argue that this space telescope primary relationship with time is that it strives to look way back in it and so as long as a given ...
7
votes
2answers
4k views

Will the James Webb Space Telescope be visible from earth?

Once the JWST is in orbit around L2, would it be possible to view it using any ground based telescopes? I’m mostly thinking of equipment available to amateurs, since I don’t have a 10m reflector. But ...
4
votes
0answers
47 views

What was Webb's "key launch clearance review" about?

Yesterday, the ESA press announcement form July 1st, 2021 was widely spreaded in various science and nerd news channels: “We are thrilled to have passed this important step towards the launch of Webb ...
2
votes
1answer
89 views

Were K2-141b and WASP-63b selected as the first two exoplanet atmospheres for JWST to look at during its first year of observations? If so, why?

In The Observatory @Donald.McLean linked to Scientists will peer at first galaxies with James Webb telescope which says in part: The new telescope will augment science performed by Hubble, not ...
1
vote
0answers
59 views

Will JWST have fewer observing sessions of much longer duration compared to Hubble?

In The Observatory @Donald.McLean linked to Scientists will peer at first galaxies with James Webb telescope which says in part: Many of the proposed tasks for the Webb telescope were planned and ...
2
votes
1answer
87 views

Would an object placed at L1 be seen in front of the Sun from Earth?

Does anything placed at the Lagrangian point L1 between the Earth and Sun obscure the Sun like a transit of the innermore planets? The James Webb telescope is to be placed at L2, but if it was placed ...
4
votes
1answer
197 views

How does NASA's ASTHROS stratospheric telescope compare to its James Webb space telescope?

In Space SE I've asked Would it have been cheaper and faster to put a James Webb-like Space Telescope on a balloon instead of a rocket? I linked there to a few news items: CNET: NASA to send stadium-...
10
votes
1answer
346 views

Will James Webb see Population III stars?

I have heard that James Webb will see the first stars that our universe produced. Can I assume that we may see galaxies that are so young that all of the stars in them are population III?
9
votes
0answers
160 views

What alternative facilities would be available in the event of JWST being destroyed?

Unfortunately, space launches can and do go wrong. Suppose that after all the delays and budget overruns, the launch of the James Webb Space Telescope fails and the telescope becomes a cloud of very ...
4
votes
1answer
243 views

How will microshutter arrays be used in the James Webb and future space telescopes?

Question: How will microshutter arrays be used in the James Webb and future space telescopes? Are they acting as a sort of moving pinhole or slit, or is the pattern more complicated, like a coded ...
8
votes
1answer
745 views

Will JWST be as durable as the hubble telescope?

JW Space Telescope is designed for a 5-10 year mission duration. Seeing as Hubble and other space missions have paved the way for JWST for reliability issues, It even has zero friction gyro's with 100+...
9
votes
1answer
137 views

What is the projected range of the JWST to be able to detect exoplanet atmospheres?

Yesterday the K2 mission detected transit events of objects passing in front of a number of M dwarfs which could turn out to be rocky planets. If some of these planets host atmospheres, could the JWST ...
10
votes
2answers
195 views

What visual artifacts are expected from the JWST?

What visual artifacts should we expect from the images that will be released from the James Webb Space Telescope? Specifically, do we expect 3-pronged diffraction spikes (any preview how they would ...
11
votes
1answer
257 views

Could the James Webb Space Telescope detect biosignals on exoplanets?

The James Webb Space Telescope (JWST) which is slated to launch in 2018 will bring us a better view of exoplanets, but will it be sufficient to detect signs of life on at least some of those worlds? ...
21
votes
2answers
2k views

Parking a telescope at a Lagrange point: is this a good idea from a debris point of view?

The James Webb space telescope is supposed to be located at the Earth-Sun L2 Lagrange point. Do we expect the region around that point to have a higher concentration of space debris, asteroids, dust,...