In the northwest and northwestern low sky, after sunset on Tuesday evening, April 17, sky observers will see a crescent-shaped elongated stripe, 5% of which is illuminated, two days after the new stage.
Earth’s “sister planet” will get a little higher each week in April. Venus will remain small and roundish in telescopes this month, but from early April until early September, the planet will be at least 10 degrees above the horizon 45 minutes after sunset (though never very high).
We will see its disk grow and gradually wane in illumination, ultimately narrowing to a crescent by late August.
The following night, Wednesday, be sure to look for a very pretty sight, as a slightly wider crescent moon will appear to float near the bottom of the beautiful, V-shaped Hyades star cluster, marking the face of Taurus, the Bull.
Initially, in the bright evening twilight, only the moon will be visible, but once the sky has become completely dark, soon after 9 p.m. your local time, the Hyades stars should be readily evident with the unaided eye.
The Hyades are 140 light-years from us, but Aldebaran is much closer, at 67 light-years. Yet, by happenstance, it helps to form — along with the members of the Hyades cluster — an almost perfect letter V in our sky.
Old moon in the arms of the new
Binoculars will greatly enhance the view, not only of the cluster’s individual stars, but also of the phenomenon known as Earthshine: the waxing crescent moon appearing as a thin arc of yellowish-white light enclosing a ghostly, bluish-gray ball.
For several nights up to nearly a week after the new moon, sunlight reflected from Earth will illuminate the nightside of the moon, making the satellite’s entire disk visible.
Hello to the Sisters
Finally, on the following Tuesday (April 24), wait at least an hour after sunset to see the Pleiades star cluster — popularly known as the “Seven Sisters” — poised beautifully about 3 and one-half degrees to the upper right of Venus (binoculars will help).
Aldebaran and the Hyades will be somewhat farther to the upper left of Venus