STEVEN
Welcome to Idaho Skies for
the weekend of October 25th. We’re your hosts, Steven…
BENJAMIN
…and Benjamin.
PAUL
This weekend gives stargazers opportunities to see three
terrestrial planets. They’re Mercury, Venus, and Mars.
STEVEN
Let’s start with the innermost planets, Mercury and Venus. When
Mercury or Venus appear their highest above the horizon, astronomers call it an
apparition. Unfortunately, many apparitions of Mercury are not very good.
That’s because it orbits the too closely and its orbit appears inclined to our
horizon.
BENJAMIN
Our best view of Mercury is on the days around the 25th.
You’ll have many days to see Mercury, so there’s no problem its cloudy. Mercury
won’t be very bright, Venus in fact will stand out more than Mercury. So look
left of the Evening star at around 7:00 PM for Mercury.
STEVEN
Mars is not an evening planet right now. So only stargazers
who observe the sky during the morning are going to locate the planet. Saturday
morning would be a great time because the moon will be close by. Now Mars won’t
be very bright, and the moon will be a very narrow crescent.
BENJAMIN
So look in the very low east at about 7:00 AM. The moon’s
narrow crescent may be filled in with sunlight that has reflected off of Earth.
Mars will be the faint star beneath the moon and slightly right. Their distance
apart will be 1.5 degrees. That’s three times the moon’s apparent
diameter.
PAUL
Stargazers with an interest in planets will enjoy this
weekend. Don’t forget however, that Jupiter and Saturn will also be visible in
the evening after dark. Just look in the low south and southeast.
STEVEN
That’s Idaho Skies
for the weekend of October 25th.
BENJAMIN
Be sure to read our blog for additional information.
It’s at idahoskies.blogspot.com.
For Idaho Skies this is Benjamin…
STEVEN
…and Steven.
BENJAMIN
Dark skies and bright stars.
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