Questions tagged [albedo]
Questions about the extent to which an astronomic object reflects light or other electromagnetic radiation. Consider using the tag "photometry".
27
questions
3
votes
1
answer
78
views
What is the difference between albedo and Bond albedo?
Recently I came across Bond albedo, but I am not sure I grasped the difference (if there is any) between it and the "classical" albedo. Thanks in advance
- 335
1
vote
1
answer
81
views
Natural satellites sorted by albedo
Can I find a list of natural satellites of the Solar System with the average albedo for each one ?
Enceladus, for instance has an albedo of 0.81 and Triton has an albedo of 0.76. But has someone ...
- 17.6k
0
votes
0
answers
28
views
Solar system datasets for exoplanet analogs?
Are there data from the solar system available, that are about quantities we regularly investigate in exoplanet searches?
The only collection I know of comes from this paper: "A Catalog of ...
- 399
9
votes
2
answers
274
views
What is the albedo of the far side of the Moon?
As is well known, and as you can see in the image below, the far side of the Moon is brighter than its near side. What is its overall albedo? And what would be the magnitude of a full moon if the (...
- 403
28
votes
4
answers
7k
views
Which is brighter, Mars as seen from Earth, or Earth as seen from Mars?
At their closest flyby, Earth is ‘new’ and dim from Mars, and Mars is ‘full’ from Earth and brightest as seen from Earth.
When Earth is 39 degrees from the Sun then Earth is brightest as seen from ...
- 653
1
vote
3
answers
562
views
Calculating the luminosity of a comet
Assuming a 9-km comet is heading towards the Earth and it is at distance 5.2 AU away from the Sun, what is its luminosity? Assume that it has an albedo of 0.5?
For now, I have calculated the Sun's ...
- 21
2
votes
1
answer
67
views
Is scattering efficiency of dust related to albedo?
I know that the scattering cross-sections of dust in comets depend on the scattering efficiency. A higher scattering efficiency leads to an increase in brightness. Therefore, does it mean that this ...
- 188
2
votes
2
answers
241
views
Do the earth and the moon reflect the different fractions of total solar radiation proportionally?
Reading on this website that: "All of the energy from the Sun that reaches the Earth arrives as solar radiation". "Solar radiation includes visible light, ultraviolet light, infrared, ...
- 575
1
vote
0
answers
507
views
How is bond albedo calculated?
According to this website, Bond albedos are computed by calculating the ratio of the flux reflected by a planet (integrated over wavelength) to the total stellar flux incident on the planet.
Three ...
- 575
0
votes
0
answers
132
views
What is the highest albedo of the earth's surface facing the sun ever measured?
This website (page 26) claims that full-earth-shine on the moon is 100 times greater than full-moon-shine on earth. The figure 100 is made up of the difference between the size of the earth and the ...
- 575
2
votes
0
answers
356
views
How can Bond Albedo be greater than Geometric Albedo?
Have gathered from papers like this one (*) that "Albedo is differentiated into two general types: (1) normal, reflective or geometric albedo, and (2) bond albedo". The document explained ...
- 575
7
votes
2
answers
811
views
Does lack of atmosphere on the moon make earth-shine more, or less, bright?
The earth acts like a light-globe in the sky for half of the moon, the side that is facing the earth. In what way does lack of moon atmosphere influence earth-shine. Does it make earth-albedo brighter,...
- 575
16
votes
1
answer
3k
views
How many times brighter would full-earth-shine appear to people standing on the moon, than full-moon-shine does to people on earth?
The definition of brightness, according to Wikipedia:
the term brightness in astronomy is generally used to refer to an object's apparent brightness: that is, how bright an object appears to an ...
- 575
17
votes
7
answers
6k
views
Why would the side of the moon that faces earth be as dark as the far side of the moon?
Somebody suggested that the side of the moon that always faces the earth is as dark as the far side of the moon, but is that really the case? Doesn’t earth-shine make the earth-facing side of the moon ...
- 575
3
votes
1
answer
186
views
Snowball Earth brightness
The Earth likely froze over almost completely about 700 million years ago. This increased its albedo significantly, and I wonder if that would have a considerable effect on its apparent magnitude from ...
- 133