Explore Mars this month
The Red Planet puts on its best show in more than six years in April.
Look
for brilliant Mars in the southeastern sky after darkness falls. The
Red Planet lies in Virgo, not far from the bright star Spica.
Astronomy: Roen Kelly
The Red Planet has returned to glory.
Every two years, Mars puts on a show in the evening sky as it reaches a
point in its orbit called opposition, when the planet lies opposite the
Sun in our sky, which means it rises near sunset and remains visible all
night. In 2014, this event occurs April 8, and it signals the best
views of the Red Planet in more than six years.
On that night, look for a brilliant point
of light in the southeastern sky just above the bright star Spica in the
constellation Virgo. That’s Mars, which shines at magnitude –1.5,
brighter than it has since December 2007. The Red Planet even appears
slightly brighter than the night sky’s brightest star, Sirius.
Mars is comparatively impressive this year
compared to the past few oppositions because the orbits of Earth and
Mars aren’t circular. At a distant opposition, the Red Planet can be
more than 60 million miles (97 million kilometers) away. On April 14 of
this year, though, it lies 57.4 million miles (92.3 million km) distant.
As that point, the planet appears 15.2” across through a telescope, and
that diameter doesn’t drop below 14.6” throughout the rest of April.
“Check out Mars with naked eyes in the
early evening during April, but then transfer to a telescope for better
views,” says Senior Editor Richard Talcott. “Because light from the
planet passes through less of Earth’s atmosphere when it lies higher in
the sky, the best observing should come in the hours around midnight.”
The most obvious Red Planet feature to
check out through a telescope is the north polar cap. Because it’s
currently early summer for Mars’ northern hemisphere, careful observers
should be able to see the cap shrink during April.
Mars won’t appear this big and bright
again until its next opposition May 22, 2016, so don’t wait any longer
to check out the Red Planet.
Fast facts
- Earth is 9.3 times as massive and nearly twice as wide as Mars.
- From Mars, the Sun appears 44 percent as bright as it does from Earth.
- Mars has two small moons, Phobos and Deimos, both of which Asaph Hall discovered in 1877.
- Mars is the most explored planet besides Earth. There have been 18 successful missions to the Red Planet, including five that are still ongoing, and two more are currently en route.
