The September evening sky is something an amatuer astronomer cannot miss out. The sky is decorated with four bright 'jewels' of the solar system: Venus, Mars, Jupiter and Saturn. The four planets are roughly in a line and are clearly visible to the naked eye. Here is how you can relish this view of heavens above!
Note: The time for India is in IST and for America, it is in EDT. For America, the data has been computed for New York City. For other places, there might be a slight variation in time depending on where you live.
The Roman God of Love is the first planet you must seek at dusk, for it will be the first one to set. From India , Venus will be visible as a bright speck from 6:46 p.m. as the dusk sky fades. The planet will be 18 degrees above the south western horizon. It will then sink towards the horizon, setting 1 hour and 50 minutes after the Sun at 8:20 p.m. Venus is the brightest of all planets at an apparent magnitude of -4.5 and is currently in Virgo.
From America, Venus will come into sight at around 7:30 p.m. and will be 10 degrees above the horizon in the same direction as in India. It will set at 8:34 p.m.
The largest planet of the solar system will be on the upper left of Venus, shining at a magnitude of -1.91. From India, Jupiter will be visible at the same time as Venus but will be higher in the sky at 31 degrees in the south western horizon. Jupiter will exit the show 3 hours and 6 minutes after the sunset, at 9:36 p.m. Jupiter is currently in Libra.
From America, Jupiter can be seen as an early evening object at 7:30 p.m. as the dusk sky fades, 21 degrees above the horizon. It will set 2 hours and 36 minutes after the Sun at 21:48.
The third planet that will be visible in the line will be The Lord of the Rings, Saturn. The ringed planet is the faintest (apparent magnitude of +0.40) among all the four guests of the evening sky, yet bright enough to be spotted with the naked eye. From India, Saturn will be accessible at around 6: 57 p.m. as the dusk sky fades, 38 degrees above the southern horizon. It will continue to be observable until around 11:29 p.m. , when it will sink to 10° above the south-western horizon. Saturn will completely set at 12:30 a.m. Saturn is currently in Sagittarius.
From America, Saturn will be visible at around 7:45 p.m. and will be 26 degrees above the southern horizon. It will reach its highest point in the sky 5 minutes later, at 7:50 p.m.
The Roman God of War will be the fourth planet from right that will be visible with the naked eye. From India, it is visible in the evening sky, becoming accessible at around 6:46 p.m. as the dusk sky fades, 24° above the south-eastern horizon. Mars is bright at an apparent magnitude of -1.89 and is currently in Capricornus as shown in the image above.
From America, Mars will become accessible at around 19:30 (EDT) as the dusk sky fades, 16° above the south-eastern horizon.
Source: The Data has been taken from In-The-Sky.
Also Read: The Concept of Magnitude in Astrophysics