Stellar Wind / Spherical Outflow

import matplotlib.pyplot as plt
import numpy as np

# Spherical outflow (stellar wind, explosion)
n = 5
x = np.linspace(-2, 2, n)
y = np.linspace(-2, 2, n)
z = np.linspace(-2, 2, n)
X, Y, Z = np.meshgrid(x, y, z)

# Radial outflow with r^-2 decay
r = np.sqrt(X**2 + Y**2 + Z**2) + 0.3
speed = 1 / r
U = X / r * speed
V = Y / r * speed
W = Z / r * speed

fig = plt.figure(figsize=(10, 8), facecolor='#ffffff')
ax = fig.add_subplot(111, projection='3d', facecolor='#ffffff')

ax.quiver(X, Y, Z, U, V, W, length=0.5, normalize=True,
          color='#0ea5e9', alpha=0.8, arrow_length_ratio=0.3)

# Mark center
ax.scatter([0], [0], [0], color='#fbbf24', s=200, marker='*')

ax.set_xlim(-2.5, 2.5)
ax.set_ylim(-2.5, 2.5)
ax.set_zlim(-2.5, 2.5)

ax.set_xlabel('X', color='#1f2937', fontsize=10)
ax.set_ylabel('Y', color='#1f2937', fontsize=10)
ax.set_zlabel('Z', color='#1f2937', fontsize=10)
ax.set_title('Stellar Wind / Spherical Outflow', color='#1f2937', fontsize=14, fontweight='bold', pad=20)

ax.tick_params(colors='#6b7280', labelsize=8)
ax.xaxis.pane.fill = False
ax.yaxis.pane.fill = False
ax.zaxis.pane.fill = False
ax.xaxis.pane.set_edgecolor('#e5e7eb')
ax.yaxis.pane.set_edgecolor('#e5e7eb')
ax.zaxis.pane.set_edgecolor('#e5e7eb')

ax.view_init(elev=25, azim=45)
plt.tight_layout()
plt.show()