Astronomy Stack Exchange

17

votes

4

answers

1k

views

Can a planet with no atmosphere be orbited at extremely low altitudes?

answered 1 hour ago astrho 1

0

votes

1

answer

33

views

Calculate speed of a galaxy with redshift

redshift speed wavelength

modified 3 hours ago Albert 188

1

vote

0

answers

34

views

how to plot Gauss-Hermite moment maps from arrays of star velocity values in Python?

data-analysis python stellar-astrophysics kinematics map

modified 3 hours ago Jerome 99

1

vote

0

answers

25

views

How to find the aFOV of a eyepiece?

observational-astronomy telescope stellarium

modified 5 hours ago uhoh 31.1k

1

vote

1

answer

46

views

Massive star formation

star-formation

answered 10 hours ago Thomas 1,460

0

votes

0

answers

18

views

jwst data analysis pipeline -- how to become proficient

jswt data-pipeline

asked 13 hours ago tckosvic 341

0

votes

0

answers

10

views

The Eddington pulsation constant

variable-star eddington-luminosity

asked 13 hours ago Александр Иванов 1

2

votes

0

answers

18

views

Difference between fluid Love number and tidal Love number

tidal-forces

asked 17 hours ago ValientProcess 311

2

votes

2

answers

60

views

How do telescopes avoid blurry images?

telescope

answered 19 hours ago Carl Witthoft 3,119

0

votes

0

answers

10

views

Databases for galaxy luminosity profiles and velocity rotation curves

galaxy rotation

asked 20 hours ago user297148 1

5

votes

2

answers

104

views

Same area, different shape. pro's & cons

telescope mathematics optics space-telescope

answered 20 hours ago Buk 49

3

votes

2

answers

99

views

How can it be justified that every discovery at z > 1 is an indication of "slowing down" or past deceleration?

cosmology dark-energy

modified 21 hours ago pela 29.7k

2

votes

2

answers

69

views

What is the reason for Hercules A to emit huge fountains of Plasma?

black-hole supermassive-black-hole

modified 22 hours ago Kavin Ishwaran 1,023

8

votes

3

answers

4k

views

Will the James Webb Space Telescope be visible from earth?

james-webb-space-telescope

modified yesterday Albert 188

4

votes

2

answers

265

views

Good source for the relationship between absolute magnitude, diameter, and albedo?

asteroids absolute-magnitude

modified yesterday Albert 188

4

votes

1

answer

475

views

How to calculate the moon's illuminated fraction tilt?

the-moon algorithm

modified yesterday bthoven 1

0

votes

0

answers

19

views

What does it specifically mean that internal energy is a function of temperature and volume U(T,V)?

black-hole temperature thermodynamics

asked yesterday Get_ Maths 1

0

votes

0

answers

27

views

What is the skypath of JWST?

orbit james-webb-space-telescope

asked yesterday Woody 665

1

vote

1

answer

96

views

Brown Dwarf Sun: How dim can a star be in the visible spectrum and still provide enough heat for a planet to be habitable?

apparent-magnitude brown-dwarf habitable-zone

modified yesterday CR131873 56

7

votes

2

answers

1k

views

Will 3,600ft asteroid be visible at my location tonight?

observational-astronomy amateur-observing asteroids

answered yesterday Mike G 16.4k

4

votes

2

answers

154

views

Probability of transit of an exoplanet in front of its star

exoplanet mathematics planetary-transits planetary-science

modified yesterday Ng Ph 298

3

votes

1

answer

67

views

The reason for an exoplanet density increase of planets closer to a star

exoplanet star-formation planetary-formation

modified yesterday ProfRob 107k

22

votes

2

answers

3k

views

What ground-based observational evidence is there that the Moon doesn't have an atmosphere?

observational-astronomy the-moon

modified 2 days ago M. A. Golding 3,951

6

votes

4

answers

2k

views

How can a black hole have a charge, or be charged?

black-hole astrophysics cosmology supermassive-black-hole theories

modified 2 days ago Jan Gogolin 109

11

votes

2

answers

2k

views

14,000 square degrees

mathematics terminology sky-survey

modified 2 days ago HDE 226868♦ 33.1k

2

votes

2

answers

129

views

How to calculate the limb darkening $\mu$ value

star the-sun planet planetary-transits

answered 2 days ago giardia 849

1

vote

0

answers

14

views

what is the difference between Composite Stellar Population and Galaxy Spectral Energy Distribution?

galaxy spectra star-formation dust modeling

asked 2 days ago fslack 51

27

votes

4

answers

13k

views

Is there a theoretical maximum size limit for a star?

star size

answered 2 days ago Andrew S 1

5

votes

2

answers

146

views

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

infrared james-webb-space-telescope

modified Jan 16 at 22:18 John McCarthy 141

2

votes

0

answers

87

views

+200

Astrophotography editing options and strategies for images of galaxies taken with a telescope + cell phone?

galaxy amateur-observing photography software image-processing

modified Jan 16 at 22:02 uhoh 31.1k

3

votes

0

answers

30

views

How would white light cavities (WLC) work for gravitational wave detection?

gravitational-waves photons quantum-mechanics ligo

asked Jan 16 at 20:51 Gursimran Randhawa 31

2

votes

0

answers

46

views

How strong is the evidence or argument for the Moon as stabilizer of Earth's axial tilt?

the-moon earth

asked Jan 16 at 20:35 Anthony X 531

2

votes

2

answers

79

views

The Lambda-CDM-model: when will the Age of the universe catch up with the Hubble time?

cosmology

answered Jan 16 at 16:33 Hilmer Brytesson 31

1

vote

1

answer

61

views

Downloadable GCNS (Gaia Catalog of Nearby Stars)

data-analysis gaia star-catalogues raw-data

answered Jan 16 at 16:22 CR131873 56

1

vote

1

answer

37

views

How does IXPE measure polarization, and why does it have three identical X-ray telescopes?

observational-astronomy space-telescope instruments x-ray ixpe

modified Jan 16 at 14:30 uhoh 31.1k

3

votes

1

answer

139

views

+200

Did Arecibo's secondary optics compensate aberrations when viewing farther away from vertical?

radio-astronomy optics radio-telescope

modified Jan 16 at 13:06 uhoh 31.1k

2

votes

1

answer

73

views

What does lowercase 'beta' mean in this graph of radio-emitting galaxies?

observational-astronomy astrophysics cosmology radio-astronomy

modified Jan 16 at 13:04 uhoh 31.1k

15

votes

1

answer

578

views

How to determine scalar-to-tensor ratio r from CMB polarization spectrum?

cosmology data-analysis cmb

modified Jan 16 at 13:02 uhoh 31.1k

1

vote

0

answers

79

views

Search of technosignatures (and the reciprocity of SETI)

seti

modified Jan 16 at 10:32 Ng Ph 298

0

votes

1

answer

37

views

How to interpret this spectrum of the "new DESI Quasar at z = 6.53"; what causes the big edge at about 9150 Angstroms?

observational-astronomy data-analysis spectroscopy redshift quasars

modified Jan 16 at 10:02 Thomas 1,460

2

votes

1

answer

121

views

What is the apparent magnitude of the Milky Way from the viewpoint of the Large Magellanic Cloud?

milky-way apparent-magnitude magellanic-cloud

answered Jan 16 at 9:19 James K 81.6k

4

votes

0

answers

107

views

+100

Longest time after an image was taken when a new solar system body was discovered from it?

observational-astronomy solar-system photography history

modified Jan 16 at 7:18 uhoh 31.1k

3

votes

0

answers

62

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?

solar-system hubble-telescope kuiper-belt infrared james-webb-space-telescope

modified Jan 16 at 1:59 Roger Wood 740

6

votes

1

answer

165

views

What are realistic and unrealistic values for the high energy gamma ray spectral indices of pulsar wind nebulae?

spectroscopy nebula pulsar gamma-rays

modified Jan 16 at 1:03 CommunityBot 1

2

votes

1

answer

99

views

How does eyepiece exit pupil diameter affect image clarity and viewing experience?

telescope amateur-observing optics binoculars eyepiece

modified Jan 15 at 22:03 CommunityBot 1

2

votes

1

answer

71

views

Benefits to adding a 32mm Pössl to my Celestron AstroMaster 130EQ's eyepieces?

telescope amateur-observing optics

modified Jan 15 at 21:02 CommunityBot 1

3

votes

3

answers

197

views

What was the field of view of the Ohio State University Radio Observatory of Wow! signal fame?

observational-astronomy radio-astronomy history radio-telescope

answered Jan 15 at 19:07 Erich Habich-Traut 1

4

votes

0

answers

66

views

How do the giant planets excite the orbits of asteroids?

solar-system asteroids planetary-science kuiper-belt asteroid-evolution

asked Jan 15 at 10:05 Ambica Govind 537

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