Astrophysics calculations

Black Body Radiation

Wein’s displacement law(only for black bodies) λmax= W/T Wein’s constant(W)= 2.90 × 10−3m K T= temperature of the black body

Gravitation

Kepler's Laws

How do you calculate angular size in astronomy?

Calculate the angular size of an object based on its apparent size and distance between measure and observer
Where theta is the angular size in radians
Sap is the apparent size in mm and l is the distance between the measure and the observer.
What is Angular Size in Astronomy?

How do you calculate luminosity?

The luminosity of a source is the total energy emitted per unit time.
The SI unit of luminosity is just Watts.
Luminosity can be determined from the ﬂux of an object by inte- grating over its entire surface:
(39) L = Z F dA As with ﬂux
There is also an equivalent luminosity density
Deﬁned anal- ogously to Eq. 38.

How do you find the emergent intensity of a star?

Where anand bnare independent oftn– for example
Two blackbodies of different temperatures.
When we plug this form into the formal solution of Eq. 135 and turn the crank
We ﬁnd that theemergent intensityfrom the top of the star’s atmosphere (tn= 0) is (138) In(tn= 0
M) = an+bnm

What is the equation of State in a star?

11.4 The Equation of State In a star
An equation of state relates the pressure
And tempera- ture of the gas.
These quantities are generally dependent on the composition of the gas as well.
Anequation of statethen has the general dependence P = P(r
X).
The simplest example of this is the ideal gas equation.

How do you calculate angular size in astronomy?

Calculate the angular size of an object based on its apparent size and distance between measure and observer, where theta is the angular size in radians, Sap is the apparent size in mm and l is the distance between the measure and the observer

What is Angular Size in Astronomy?

What are the different types of Astrophysics theories?

It describes both direct and compoundreactions, making the connections to astrophysics

A variety of theories are coveredin detail, including the adiabatic model and the CDCC method for breakup, eikonalmodels for stripping, R-matrix techniques, and the Hauser-Feshbach theory forcompound nucleus reactions

When did astronomy with your Calculator come out?

In 1979, when the first edition of Practical Astronomy with your Calculator was published, very few people had access to a computer

Although home computers were beginning to appear in the high street, they were not the commonplace household accessory we see today

Atomic astrophysics is concerned with performing atomic physics calculations that will be useful to astronomers and using atomic data to interpret astronomical observations.Atomic physics plays a key role in astrophysics as astronomers' only information about a particular object comes through the light that it emits

And this light arises through atomic transitions.