Submit Your Poems
Get Your Premium Membership

See and share Beautiful Nature Photos and amazing photos of interesting places

Quote of the Day

Quote Left"The harder you work, the luckier you get."Quote Right

by Gary Player

  |  Comment

Untitled #351 / Sagittarius A

Jesse Jones Avatar  Send Soup Mail  Block poet from commenting on your poetry

Below is the poem entitled Untitled #351 / Sagittarius A which was written by poet Jesse Jones. Please feel free to comment on this poem. However, please remember, PoetrySoup is a place of encouragement and growth.

Read Poems by Jesse Jones

Best Jesse Jones Poems

+ Fav Poet

Untitled #351 / Sagittarius A

In the center of our galaxy
from 1992 through 2003
astronomers were able to observe
a star, orbiting compact radio source
Sagittarius A.
The star had an orbit with average radius
1.4x1014 m
and period 15 years.
From this information astronomers estimated
the mass of Sagittarius A.
v = 2π(1.4x1014)/(15x365x24x60x60) = 1.86x106 m/s
a = (1.86x106)2/(1.4x1014) = 0.0247 m/s2
0.0247 = (6.673x10-11)M/(1.4x1014)2
M = 7.24x1036 kg
7.24x1036/(1.989x1030) = 3.6 million suns!
Astronomers infer that Sag. A is a
supermassive black hole
(it cannot be seen)!
OH LITTLE STAR

Post Comments

Please Login to post a comment



A comment has not been posted for this poem. Be the first to comment.