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Calculate a radius for Pluto using Sun, Pluto brightness and albedo.
Spectroscopic observations suggest that Pluto is covered with icy frost and thus has a high albedo (0.5). The brightness of Pluto at opposition (38 AU from the Earth) is 2 x 10^-17 as bright as the Sun (1 AU from the Earth. From these two observations, calculate a radius of Pluto.
Subject:
Astronomy
Topic:
The Solar System
Posting ID:
9424
OTA ID:
103642
What was Jupiter's radius if it radiated as a blackbody?
According to theoretical models, 4 billion years ago Jupiter may have had a luminosity as high as 10^-2 Lo (Lo=luminosity of Sun) and a surface temperature of 1000K. What was Jupiter's radius then if it radiated as a blackbody?
Subject:
Astronomy
Topic:
The Solar System
Posting ID:
9552
OTA ID:
103139
Estimate the radius of asteroid
A newly discovered faint asteroid and Mars are observed at opposition. Mars is observed to be 100 million times brighter than the asteroid. Assume Mars and the asteroid are 1.5 and 3.0 AU from the Sun respectively. (a) Estimate the radius of the asteroid if it has an albedo of 16%. (b) Estimate the radius of the asteroid if it has an albedo of 4%.
Subject:
Astronomy
Topic:
The Solar System
Posting ID:
9553
OTA ID:
103642
What is the difference of theory in science and in other way other than science?
Subject:
Astronomy
Topic:
The Solar System
Posting ID:
11024
OTA ID:
104014
Synodic and sidereal period of moon
Why are the synodic and sidereal period of moon different?
Subject:
Astronomy
Topic:
The Solar System
Posting ID:
11027
OTA ID:
104014
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