How Big are Exoplanets Compared to Stars?

Find 10 random known exoplanets:

In[1]:=

RandomEntity["Exoplanet",10]

Out[1]=



Kepler 603 b

HD 73526 c

Kepler 97 c

Kepler 1412 b

HD 149026 b

HD 100546 b

Kepler 58 b

K2-21 b

K2-84 b

HD 102272 b



Find their masses:

In[2]:=

EntityValue[%,"Mass"]

Out[2]=

Missing[NotAvailable],

4.2707×

2.05×

,Missing[NotAvailable],

6.98490×

,Missing[NotAvailable],

2.6383×

,Missing[NotAvailable],Missing[NotAvailable],

9.376831×



Find the masses of all known exoplanets:

In[3]:=

exodata=DeleteMissing[EntityValue["Exoplanet","Mass"]];

Make histogram of the masses:

In[4]:=

Histogram[exodata]

Out[4]=

List the masses of the five largest known exoplanets:

In[5]:=

TakeLargest[exodata,5]

Out[5]=



6.396745×

5.6944×

5.40948×

5.315×

5.16843×



Compare the largest to Jupiter:

In[6]:=

Max[exodata]

Jupiter

PLANET



mass



Out[6]=

33.70

Compare to the Sun:

In[7]:=

Max[exodata]

Sun

STAR



mass



Out[7]=

0.03216975

Get 10 random stars:

In[8]:=

RandomEntity["Star",10]

Out[8]=



HIP 6567

HD 127600

Kepler 667

HD 62188

HD 27044

HD 111042

Gl 661 B

HD 198990

HD 343192

HD 223146



Find the masses of 20 randomly chosen stars:

In[9]:=

DeleteMissing[EntityValue[RandomEntity["Star",20],"Mass"]]

Out[9]=



4.7×

2.2×

1.7×

5.6×

4.3×

1.0×



Find the ratio to the mass of the sun:

In[10]:=

%

Sun

STAR



mass



Out[10]=

{2.4,1.1,0.87,2.8,2.1,5.1}

Find the mass distribution of all stars in the system (might take a while):

In[11]:=

stardata=DeleteMissing[EntityValue["Star","Mass"]];

Make a histogram of the mass distribution:

In[12]:=

Histogram[stardata]

Out[12]=

Make a logarithmic histogram:

In[13]:=

Histogram[stardata,Automatic,{"Log","Probability"}]

Out[13]=

(Note that small stars may well be absent for reasons of detection rather than existence.)

Find the maximum mass in the data:

In[14]:=

Max[stardata]

Sun

STAR



mass



Out[14]=

2.5×

Find the minimum mass:

In[15]:=

Min[stardata]

Sun

STAR



mass



Out[15]=

0.×

-2

In[16]:=

TakeSmallest[stardata,5]

Out[16]=



2.×

4.×



In[17]:=

%

Sun

STAR



mass



Out[17]=

{0.×

-2

,0.02,0.02,0.02,0.02}

Compare smallest star to the largest exoplanet:

In[18]:=

Min[stardata]/Max[exodata]

Out[18]=

0.3

The largest exoplanet is larger than the smallest star.

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Contributed by: Stephen Wolfram

Wolfram Language Example Repository

How Big are Exoplanets Compared to Stars?

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How Big are Exoplanets Compared to Stars?

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